Subsequently seal plaster to prevent earth contact

Hello everyone,

although it was clear that at one point around our house the ground would be raised and the exterior wall would thereby become earth-contacting, the plaster (for whatever reason) was apparently applied normally by the plasterer.

I have been looking for some time now for the most sensible ways to fix this afterward, but haven’t really made any progress. Currently, I am leaning towards simply applying another layer of liquid plastic waterproofing (with a fleece insert) on the plaster. However, I have the problem that I either get a very unsightly transition to the plaster or the waterproofing has to end at the height of the turf and very precisely with the bordering L-stones.

Are there other options and ideas to execute this more elegantly?

Best regards
Toni

Chisel off the plaster in the affected area again and replaster with waterproof plaster, that's what comes to mind quickly now.