Do you think that anyone would pull away from ordering Rafale because a Rafale had been shot down by a SAM? What I would make of that is that 4G aircraft are more vulnerable to detection than 5G aircraft. I believe that has been widely know for a long time now.
Yes, absolutely. If a Rafale can be shot down easily by a run-of-the-mill air defense system, then one would think multiple times about the orders that are yet to be delivered.
That would imply air forces reconsidering ordering anything lacking low observability - Tejas Mk1A, Tejas Mk2, Eurofighter, Rafale, Gripen E, F-16 etc.
Take a country like Colombia, for example, whose fleet of Kfir is reportedly on its last legs. Does it ground its fighter force and suspend that capability until it can afford 5G fighters or does it order something 4G to maintain fighter operations in the future?
A hot conflict in which 4G fighters were being lost to air defences or enemy fighter action would encourage buyers to turn their attention to KAAN (scheduled first IWB into production) or KF-21 (probably second) or AMCA (probably third) for their future procurement needs.
It dynamically depends on situation of a country & its enemy - finance, geography, geopolitics, industry, education, trade & commerce, urgency & desire to be a lagger or leader, which define defence capability & procurement.
Smaller/weaker entity Vs bigger/stronger entity could be like Bruce Lee (or any Martial Artist) Vs opponents. He/They could defeat multiple opponents by prepared, practiced, precise (PPP) tactics.
In air-combat PPP would obviously mean
R&Ded jet ahead in gen/tech, simple.
But the other point is also true that number has its own strength, means many previous gen jets, a saturated attack,
but well coordinated. But again, losses would also be in same ratio.
The choice to make/import/field 4/5/6gen jets in front would depend on
- enemy's AAM, SAM capability Vs ours,
- our detection & friend/foe distinction capability with networking,
- our strategy & tactics to evade enemy.
But also, as everything gets obsolete with time,
Leaders enjoy supremacy by continious R&D.
Laggers suffer by delays, reasons.

EU doesn't have 5gen. GCAP, FCAS got initiated to proactively counter Russian 5&6gen. Selling Rafales, EF-2000, etc adds to revenue for R&D.
Same thing USA doing, selling F-15/16/35 to fund NGAD, F/A-XX.
After Russia revealing Su-75 & Sweden giving indication of future stealthy product, any non-stealthy project becomes a dead-end bcoz it is natural evolution,
unless some poor customers demand.
So the solution for a country, depending on various factors mentioned 1st are:
- initiate future domestic projects a.s.a.p. if having all aspect abilities (money, education, industry), will power, desire.
- where abilities missing, but money is there, is there any other option than import?
- if no money, no ability, then suffer, remain at mercy of others.
1 option is export ban on AMCA, but LCA/MWF can be transformed into stealthy exportable jet like Su-75, so situation would be like ATF VS JSF.
Other option is export variant of every jet, but keeping in mind obsolecence & evolution.