Yeah that can be a challenge. Luckily I like all sorts of beans and there are some good meat substitutions out there with a lot protein. But when I bike or take a long hike I drink a vegan protein shake to get an extra boost. And I take omega 3 and vitamin d3, but my b12 is apparently on level.

Edit: and the funny thing is after a couple of years I rarely miss meat or fish. Most of the time I don’t even think about it. One time I ate meat on accident and I was nauseous the entire evening haha