Meat or other animal products are not the only food to eat for muscles. There are vegan athletes and they would be stronger than you. https://www.nomeatathlete.com/
Really new vegans might say they miss cheese, or maybe something else. Generally there are addictions to certain substances among those to get past, but it fortunately does not take long. Find vegan things you really like to have about as often instead, those really should be healthy things, not just processed stuff. I found I could have a really great sauce that I like so much in my cooked meals almost all the time, with putting some hummus and some medium salsa in them. I use La Victoria, and I add good seasonings I like, but do not add salt to anything. And for other things I would sweeten I use something other than sugar, where I am, bone char is used to filter them so the sugar is not vegan, unless it is a brand verified as vegan, now I generally use agave nectar. Gelatin is from animals too.
I really only eat food coming from plants, deciding this way when I went vegan years ago, there is no motivation for me to change from that. I have great food this way, I can post things, or talk, about that.
Really new vegans might say they miss cheese, or maybe something else. Generally there are addictions to certain substances among those to get past, but it fortunately does not take long. Find vegan things you really like to have about as often instead, those really should be healthy things, not just processed stuff. I found I could have a really great sauce that I like so much in my cooked meals almost all the time, with putting some hummus and some medium salsa in them. I use La Victoria, and I add good seasonings I like, but do not add salt to anything. And for other things I would sweeten I use something other than sugar, where I am, bone char is used to filter them so the sugar is not vegan, unless it is a brand verified as vegan, now I generally use agave nectar. Gelatin is from animals too.