In a half-timbered house, it is almost always the wooden frame that is load-bearing in all its parts. The masonry in between and inside the wooden frame normally has no load-bearing function, so I believe that what you show in your pictures is indeed load-bearing.
What is visible in the top picture seems to be the sill and post/stanchion, and this is absolutely load-bearing in the house's construction.
But everything can be repaired, and a half-timbered house is a structure that can be relatively easily repaired; it just requires patience and time.
I have previously referred to a good film that shows a repair that is probably quite similar to what you are facing. It is in Danish, but the carpenter/tømmermanden speaks clear and good Danish, so it is easy to understand.
https://www.youtube.com/watch?v=nOwq0rcx7XA