He'll be one of those actors that does ok while Arnold is around and active in the business. Arnold's going to be 75 soon, so figure the kid's got 5 - 10 years to rack up those credits. He won't be a leading man in films or tv, but he could be low to mid cast - e.g. - "Joe, Jennifer's lover interest #2" in the credits. He would also be ok in indie work, where the Schwarzenegger connections could really help.
After Arnold's gone, if he did ok in the earlier years, it would be enough to get him enough work to stay in the business, or he could go into producing.
Judging from his IMDB, he is making a decent push into acting -
https://www.imdb.com/name/nm10410671/ .
But, it doesn't look like he'll ever have leading man chops -
.