It's clear you didn't do research. Currently, eXch shows 18.441 XMR (about $2.820.182 as 24h) while CoinGecko shows 3 exchange with higher 24h volume.
Gate is an exchange from which you can withdraw almost nothing. This can be deleted.
When I watched it sometimes, eXch was always the biggest. Sorry, I don't make daily charts. So today: top3 in the world