[2021] Forced uptiered because of nukes?

You are not forced uptiered to 9.0

This aircraft just have BR 9.0 and that's why you see it on the list as 9.0

It do not means you get uptiered there.

Simply if you are in BR 8.0 battle, your "nuke" bomber is Il-28 / Canberra B.Mk.6;