he's signed with an agency who will no doubt get him auditions but he still has to pass them and even then how many major movies or series' are looking for bodybuilders or nowadays? (even with Kai's unique look).
Hafthor Bjornsson broke the mould with his role in Game of Thrones but that was the exception not the norm really.
Back in Arnie's heyday action stars of that ilk were in demand (when men weren't estrogen fuelled beta hipsters).