Well Iran will have to rethink their strategy around Air force
Should Lock in
(Short Term)
- J10C (4 Squadrons)
- JF17 Block III Thunders (4 Squadrons)
(Long Term)
- Bring in a Western Fighter Jet , Rafale seem like quite available these days (2 Squadrons)
- Supplement with Sukhoi-30 (2 Squadrons)
Indigenous Development
- Keep a separate program for a light Medium , fighter Jet produced Locally
Need minimum deterrence
I don't know how Iran's air commands are divided, but I'll divide them by regions:

Central region: 4 air bases
Northern region: 1 air base
Eastern region: 3 air bases
Western region: 3 air bases
Northwestern region: 1 air base
Sources:
www.globalsecurity.org
Revised September 2023, this map illustrates Iranian defence infrastructure. The locations of Islamic Republic of Iran Air Force (IRIAF) bases, nuclear and missile and missile research sites are charted. The map is available as a PDF file using eps graphics, meaning that there is no loss of...
www.gsn-online.com
en.wikipedia.org
Let's say each region has its own air command and if we base it on the current air force:

FTR 138: 15 F-5B Freedom Fighter; 54 F-5E/F Tiger II;
18 F-7M Airguard; ε10 F-14 Tomcat; 35 MiG-29A/UB
Fulcrum; up to 6 Azarakhsh (reported)

FGA 73: 55 F-4D/E Phantom II; 2 Mirage F-1BQ; 10
Mirage F-1EQ; up to 6 Saegheh (reported)

ATK 29 Su-24MK Fencer D
There are 240 aircraft in service, which could mean between 10 (24 aircraft per squadron) and 20 (12 aircraft per squadron) fighter squadrons. Of course, this can vary, in Brazil we have up to 18 aircraft per squadron, if we were to base ourselves, there would be 13 fighter squadrons for Iran.
As I said, the Iranian Air Force can be created from scratch, because their aircraft are old and they can afford to ease logistics and improve readiness, in addition to the obvious greater capacity.
Iran urgently needs:
Interceptor/multirole aircraft: Su-35S or J-10CE. Whatever Iran gets is an incremental gain for the Iranian air force.
Air superiority aircraft: Su-57 or J-35A. It depends on who Iran manages to acquire, but it is essential that Iran acquires an aircraft capable of having some 5th generation capabilities for Iran to modernize its air force.
Attack aircraft: In my assessment, the best aircraft for Iran to acquire is the Su-34M. It can be configured to carry the munitions and missiles that Iran already produces, including developing air-launched versions of its ballistic missiles and hypersonic missiles, trying to reduce the weight and length to be used by the Su-34.
Of course, this would depend on other factors, such as advanced training aircraft, AWACS and the like, but for general purposes, this is my assessment, considering Iran's options. In my opinion, there are only two options, either run to China or to Russia, the French will not sell Rafale to the Iranians.

Interceptor/Multirole Aircraft: Su-35/J-10CE - 5-10 squadrons (120 aircraft)

Attack Aircraft: Su-34M - 1-2 squadrons (24 aircraft)

Air Superiority Aircraft: Su-57/J-35A - 1-2 squadrons (24 aircraft) may try to acquire more
Building such an air force will take time and money, something I am not particularly taking as a reference but I see the solution for the Iranian air force being this as the most viable path to building a modern air force compatible with its SAM capabilities which should also be expanded and improved.