All depends on what you’re currently limited by.
If you’re limited by the main thread, the new GPU won’t help.
If you’re limited by GPU, it might help, but you’ll probably run into a main thread limitation (especially if you’re not running at 4K).
Anyways, personally I feel both the 3090 and 6900XT are overpriced for what they provide over the 3080 and 6800XT