I believe it requires a 32bit clean ROM, but, yeah, you can.

Lemme dig up some links.

edit

https://www.reddit.com/r/VintageApple/comments/sonmyl/se30_m...

https://charlieharrington.com/my-new-old-apple-macintosh-se3...

https://lowendmac.com/2016/memory-upgrades-mac-se30/