I get the brand Lotao, but they are German (also available in UK IIRC). Our drug store DM also has a house brand of it. I assumed that if there are 2, there are probably more elsewhere ;)

This one?

https://www.lotao.com/en/pages/english

Yeah that's the one, I have it on subscription, 1kg/2 months (about 3kg of finished product)

But considering the simplicity of the product, I assume any brand will be very similar.

I've tried pea protein products before that had a kind of bitter taste. What is the flavor profile like?

Extremely neutral to me. I have pea protein powder and there I taste a bit of bitterness.