Beam supports

Is this 2x4 support of simply be scabbed to the concrete pier acceptable?

Looks very familiar

The support post for the beam must anchored at both ends.

I can not see if the are laminated with fasteners.
If it is just 2 x 2 x 3 wide with no limitation process I would make a comment.

Easy fix to slide some full CMU blocks and shim the supports tight.

Observation: The wood in contact with the concrete footer pad.
There is no anchorage to the footer pad and also to the beam.
Recommend. A licensed GC observe and make any recommended repairs.

IMO there is lots wrong in the crawl space.