True, but I suspect relation with China is a bit more important to Russia than relationship with India right now. Also it would be super awkward for Xi-Putin bromance if Su57 gets smocked by J35
With China...yes, but it isn't a or/or choose one relationship.
I frankly don't think Beijing is especially against it (and whole conflict with India is seen is unfortunate). It's arguably new Delhi who's more against China than vise versa.
Islamabad of course cares, but Russia and Pakistan (especially after the coup) aren't friends.
As for su-57e...well, either risk or no money.
Su-35s got shot down too, ultimately it didn't kill their export. Military planes can be shot down, unless they're 290 mil golden gooses.