Performance will be terrible as you virtualise instructions.
You can try it with QEMU for example.
Performance with Rosetta on macos is good enough for most games that shipped for x86 macos. With a decent enough graphics driver implementation it should be feasible to grab the Linux version of Rosetta and use that to play games. A lot of the emulation on Rosetta is straight instruction conversion; the hardware acts like an x86 cpu in most other ways apart from the isa. It’s not that bad as far as performance goes.
qemu-user can emulate x86_64 hardware, but it's not going to be as fast as Apple's Rosetta.
Yeah, that's what I was afraid of; honestly the reason I haven't seriously attempted moving to Arm Linux full time is because I suspect that it would be great for 99% of stuff, but that 1% of ~30 years of x86 legacy junk would be some huge blocker that forces me to change to something else.
you can copy over rosetta2 but it's not there by default (i.e. you need to dual boot mac into a linux vm with rosetta2 mounted than you can copy the rosetta2 binary)