الدعم الفني متاح.

Because Arabic often uses nominal sentences in the present tense, and in those sentences the verb to be is usually not expressed.

So:

• الدعم الفني متاح = Technical support is available

There is no separate present-tense word for is here.

If you wanted a past or future meaning, Arabic would usually add a verb, for example:

• كان الدعم الفني متاحًا = Technical support was available
• سيكون الدعم الفني متاحًا = Technical support will be available

Yes, الدعم الفني is one noun phrase.

It is made of:

• الدعم = the support
• الفني = the technical

So literally it is something like:

• the support the-technical

But in correct English-style meaning, it is simply:

• the technical support

This is a noun + adjective structure, not a hidden English-style compound noun.

Because الفني is an adjective describing الدعم, and in Arabic adjectives usually agree with the noun they describe in definiteness.

So if the noun is definite:

• الدعم = the support

then the adjective must also be definite:

• الفني = the technical

That gives:

• الدعم الفني = the technical support

Compare:

• دعم فني = technical support / a technical support service in an indefinite sense
• الدعم الفني = the technical support

No, this is not an iḍāfa.

It may look a little similar to learners, but the structure here is:

• noun + adjective

not:

• noun + noun

Why it is not iḍāfa:

1. In an iḍāfa, the first noun usually does not take الـ.
2. Here, الدعم does take الـ.
3. الفني is an adjective meaning technical, and it agrees with الدعم.

So:

• الدعم الفني = the technical support
  not
• the support of the technician or something similar

متاح is an adjective meaning available.

In this sentence, it functions as the predicate of the nominal sentence. In other words:

• الدعم الفني = the topic / subject
• متاح = what is being said about it

So the sentence structure is:

• الدعم الفني
  • متاح
• Technical support
  • available
• meaning: Technical support is available

Because it agrees with الدعم, which is singular masculine.

In Arabic, predicate adjectives commonly agree with the noun in gender and number.

So here:

• الدعم = singular masculine
• متاح = singular masculine

If the noun were feminine, you would normally expect a feminine form such as:

• متاحة

For example:

• الخدمة متاحة = The service is available

In this kind of sentence, the predicate is often indefinite.

So Arabic commonly says:

• الدعم الفني متاح

rather than:

• الدعم الفني المتاح

because المتاح would usually mean the available and would more likely be part of a larger noun phrase, not the normal predicate here.

So:

• متاح = available
• الدعم الفني متاح = technical support is available

This is the normal pattern.

With full case endings in careful formal Arabic, it would be:

• الدَّعْمُ الفَنِّيُّ مُتَاحٌ

The endings are there because:

• الدعمُ is the subject/topic of the nominal sentence
• الفنيُّ agrees with it
• متاحٌ is the predicate

In everyday writing, news headlines, interfaces, and most unvoweled text, these endings are usually omitted, so you normally just see:

• الدعم الفني متاح

A learner-friendly pronunciation is roughly:

• ad-daʿm al-fannī

A few useful pronunciation notes:

1. الد in الدعم is pronounced with assimilation because د is a sun letter.
   So ال + دعم sounds like ad-daʿm, not al-daʿm.

2. ع in دعم is the letter ʿayn, which has no exact English equivalent.
   Many learners approximate it at first, which is normal.

3. الفني is pronounced approximately al-fannī.

So the whole sentence is roughly:

• ad-daʿm al-fannī mutāḥ

The order is:

• الدعم الفني = the subject/topic
• متاح = the predicate

So it follows a very common Arabic pattern for nominal sentences:

• noun phrase + predicate

This is a very natural order in MSA.

In English, we need is:

• Technical support is available

But in Arabic, the same idea is expressed without a present-tense is.

Yes, but it does not mean exactly the same thing.

• الدعم الفني متاح = The technical support is available / Technical support is available
• دعم فني متاح = more like available technical support or technical support available, depending on context

The version with الـ sounds like a complete statement about a known service.
The version without الـ is more indefinite and may sound like a phrase rather than a full standalone sentence, unless the context makes it clear.

So for the simple statement Technical support is available, الدعم الفني متاح is the most straightforward choice.

Yes. It is a complete and perfectly normal Arabic sentence.

It is a nominal sentence consisting of:

• a subject/topic: الدعم الفني
• a predicate: متاح

That is enough to form a full sentence in Arabic.

So even though it may look short to an English speaker, it is grammatically complete.