Will the conflict in Ukraine provide a catalyst for Russia to mitigate this capability gap?
They’re already trying to establish expanded domestic semiconductor manufacturing infrastructure, since Su-57 requires substantially more SC elements than pretty much any fighter they’ve made before:
They placed side-looking AESAs in the nose instead of doing a rotating swashplate like on Su-35. This and all the embedded RF sensors in the airframe increases the Transmitting/Receiving element counts considerably, which requires a ton of manufacturing capacity in a space Russia has always struggled with industrially. They have resorted to heavy importation of breast pumps and washing machines, game consoles, etc, to remove the Western chips and then re-purpose them for military guidance systems.
It’s a very bad position to be in, since their main domestic SC company went bankrupt in Dec of 2018, and since then....Baikal and Angstrom have also gone bankrupt.
China has been providing SC chips to them through smuggling of shipments due to sanctions, but they really need modern chip mfg capacity to fulfill the orders for Su-57, S-400, and other combat systems computing, sensor, and guidance requirements.
It’s one thing to design a sensor-clustered 5th Gen fighter, and another to actually have the parts and subcomponents supply capacity under security clearance personnel and tight supply lines.
Either way, they are limited to extremely-low rate production of the Su-57, which does not have comparable VLO features to US 5th Gen, or even Chinese J-20. The J-20 is much cleaner and appears to have more modern Radar Absorbent Structures and RAM.