Small retaining walls
I have built walls just like that small ones with no weep holes larger over 24” I start adding weep holes , the mortar base is a plus some only use gravel if anything at all.  Some of the terrace walls at my cousins house we did 25 years ago 8 each 2’ walls all 100’ long almost identical with chicken wire in the bottom with the mortar , she mows it every week with a lawn tractor it has held up quite well.