It could be that the vegetarian stuff you are eating doesn’t have much protein in it. Or that the protein source doesn’t have all the amino acids. There is certainly vegetarian stuff that does have these things, it just takes more knowledge and meal design that for meat diets.
Protein powder can also be helpful for vegetarians (and everyone). I recommend pea protein powder.
It could be that the vegetarian stuff you are eating doesn’t have much protein in it. Or that the protein source doesn’t have all the amino acids. There is certainly vegetarian stuff that does have these things, it just takes more knowledge and meal design that for meat diets.
Protein powder can also be helpful for vegetarians (and everyone). I recommend pea protein powder.