Pokemon Bank allows hacked pokemon from Gen 7 to cross into Pokemon HOME, and thus onto Pokemon Sword and Shield. Here's something interesting though: you can hack Galarian Pokemon into Gen 7, then transfer them to Gen 8 via Gen 7. This is significant for those who do not have modded Nintendo Switches, as it can be relatively hard to find an exploitable Switch, but all 3DSs/2DSs are vulnerable to exploitation. This essentially functions as a way to PKHex Gen 8 Pokemon with a modded 3DS/2DS. This will likely be patched eventually, and could potentially be a large ban risk to attempt. I haven't been banned, but I've only been playing around with this for a week. Enjoy!