You asked

Should I upgrade from the fujifilm x a3?

Whether you should upgrade depends on what's holding your photos back. The Fujifilm X-A3 has no stabilisation in the body, so if blur from shake is the problem, a stabilised lens will help without a new camera. From its lens list, I'd look at:

If you do decide to move to a new body, buying used is a sensible way to get more camera for less money.

Written by Claude from this site's pages.

From these pages