If the Samsung Galaxy tab line isn't out of your price range that's what I'd go for. They're the gold standard as far as android tablets go. I had a good run with my tab s6 (2019 to this year) and I'm pretty happy with the refurb tab s9 I bought to replace it.
Snapdragon 8 gen 2 (tab s9) will absolutely crush any emulation or android gaming workload you throw at it.
I think a refurb or lightly used s9 with the s pen is around $350ish on fleaBay these days. I bought mine for $400 last year but didn't switch over to it until recently.