This is a great article explaining the Boost hub width thing
https://www.mtbr.com/threads/tech-ta...ained.1170220/

(you have to click “see more” for the full post)

It seems unlikely this is a 148 wheel hub since it fits in his gravel bike dropouts. If the thru-axle screws in ok without the wheel there, maybe it’s just an alignment problem. I had to temporarily loosen the rear mech hanger (which effectively forms the outer face of the dropout) on my crappy Cube CX bike to be able to get the axle to screw in.