Luckily p90s were issued before the Tollan were wiped out by Tanith.

So theoretically it’s possible, but only technically. I got the feeling they didn’t visit the SGC after they left except the two other times we see them. During O’Neill’s “rebel” phase to expose Maybournes’ off world shenanigans, and the very episode where they end.

I might be a bit of a Stargate nerd… And I can’t even make fun if star trek nerds either because I’m one of those, too…