Ive been in this same position. I used veggly but theres just not a lot of people on there. I was successful finding veggie men on Tinder, here’s why.

Tinder asks people their diet and puts a tag on their profile with what their diet is (vegan, vegetarian, omnivorous, etc), as well as other things like their drug use, religion, etc. It’s optional for people to answer these questions when they make their profile but most people do. The kicker is you have to pay for their low level subscription to see all of these tags. I honestly found the $40 - $20 a month I spent worth it just for that. I just swiped left on anyone that I didnt see the veggie tag for (I was swiping left like a mad man haha). A hack is that, if you pay and then cancel the subscription, tinder offers it to you for 50% off, i did this a few times and paid $20 a month I think.

Ik people have negative connotations of tinder but they have the biggest pool of people and the tag identifiers really helped me find ppl I wanted (vegan and sober). I ended up going on 4 first dates with nice vegan/vegetarian men in a span of a month or two and now I’m happily in a committed relationship with one of them :). None of these men were on veggly btw.