I have limited knowledge about Russian Air Defense Umbrella
but I know what about upcoming Turkish Air Force to stop F-35s
Turkiye create AI supported Air Defense Umbrella with multiple Radars and Aselsan HERİKKS Air Defence Early Warning and C4I System that manages the air defence activities on Tactical level
HERİKKS receives air threat information from a variety of radars, produces a recognized air picture in real time and assigns the available air defense weapons to selected targets
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4.5 gen Fighter Jets and their X band AESA Radars can detect F-35s from 30-35 km away and game over ......... F-35 easly can beat F-16V , RAFALE , etc in BVR combat
We need KAAN + KIZILEMA stealth Fighter Jets to match with the F-35s
..... Networked Air Defense Systems can stop F-35s.....
TURAF has L and S band early warning Radars with link-16 data link for network centric warfare
-- Italian RAT-31DL Radar can detect F-35 from 123 km ... ( estimated )
-- American AN/FPS-117 Radar can detect F-35 from 120+ km ... ( estimated )
-- American Boing E-7T AEWC can detect F-35 from 113 km ... ( estimated )
Also Turkish Aselsan ALP-300G S band AESA early warning radar can detect F-35 from long distance to guide 150 km SIPER AD Missile on the F-35
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HISAR-A/O , GOKDEMIR , SIPER Air Defense Systems
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SIPER will be more dangerous than S400
S400 works in stand alone mode
on the other hand
SIPER will work with Air/Land/Naval units for ability to operate in coordination via tactical data-links