Your biggest issue is that the 3070 is a 1440P card and not 4K. The 3080 was always marketed as the full fat 4K card.
The big airliners are very processor heavy aircraft and your processor isn’t the most powerful. At this point I think we’re all waiting on the long awaited sim optimisations we’re apparently getting around the XBox release in early August. Hopefully things will improve for everyone then.