Just like any other military including the US, no?
I don't have access to perfect information, but I find the reports that Russia is unable to maintain their entire fleet creditable, and believe and/or the experts who confirm this analysis.
Obviously Russia has no 5gen at all (or just a few 5gen Su-57, if we going to name them 5gen).
Anyway, my point is that as of now Russia has no need for gen5 and can't afford it anyway, just like about anyone else except for the US and a few countries that have them but at the same time have to rely on the US anyway.
What matters these days is the cost of buying/flying/maintenance, software platform and what missiles they can launch.
Gripen has modular upgradable software, and supports modern europe made missiles such as Taurus and Meteor.
For the same reason I consider the F35 a failure.
I expect a crash program to reengineer them has already started if only unofficially.
The EU without the US can already produce 5th gen, the selling point of the F35 was 6th gen compatible with 7th gen (NGAD).
Russia is still flying more 4th then 5th gen fighters, because they can't get their bricks off the ground. Why would the EU want to copy the same mistakes of their enemy?