Feature requests are more complicated.
With bug reports, there’s almost always a concrete well specified problem that’s owned by a specific team that both the developer reporting the issue and the engineer fixing the bug want to suss out. Also there’s a very binary “has it been fixed yet” status. As such it’s useful to collect and make use of more structured information about bugs.
With feature requests things usually aren’t so clear, because there’s multiple ways that the developers needs can be filled and it’s more of a creative process figuring out what overlap of needs there is and how best to fill it.