ID help with rescue puppy

Hey Rottie owners.

I’m chasing some assistance with identifying my puppy I rescued a week ago.

Bear was listed as a Kelpie cross by the rescue at a guess, as they received a whole litter without getting info about the parents breeds.

I’m almost certain that he’s Rottweiler, and the iPhone function in photos lists him as Rottweiler. But I’m hoping to find out what he might be crossed with.

Whatever he might be I would be fine with, I just want to be prepared with what I might expect in terms of behavioral traits.

Any ideas would be appreciated. Cheers.