Is this concrete spalling and is it cause for concern?

images https://imgur.com/a/KpaNUP9

Recently moved into this house in AB, canada, built in the 1970s, the initial home inspection only mentioned cracks, not this weird dissolved out looking areas (is this spalling??)

I was going around the house to fill in minor cracks today with polyurethane sealant, since there are some normal minor cracks out around the front of the home but but noticed these areas where it looks like the cement has dissolved out, leaving a bunch of loosely held gravel/pebbles, before it was painted over around the sides/back of the home's exterior. It's not consistently everywhere, seems especially between certain blocks of concrete and around some edges. No other issues - no water intrusion inside, horizontal cracks, etc etc.

Can I seal these areas the same way I'd seal minor cracks or shoudl I be doing something else?

Is this extent of wear normal? should I really be getting a professional to take a look??