What exchange involves in that growth?
Is it Binance?
Segwit adoption support was announced in December 2020Support does not enough and it takes time for people to be aware of Segwit advantages and adapt to Segwit transactions. So I feel reasonable (5 months from Dec 2020 to May 2021) to see this adaptation and signifcant growth)
Probably not. An overwhelming majority of Binance transactions are still legacy. Their hot wallet is here: 1NDyJtNTjmwk5xPNhjgAMu4HDHigtobu1s. You can see that a huge bulk of consolidations all originate from v1 Bitcoin addresses. Default, CMIIW is still legacy addresses and you can toggle between those and which most people probably won't because it doesn't benefit them. I'll probably assume that Binance has nothing to do with this but rather because of the drop in TX volume recently, then you're seeing lesser of the groups of people who are not concerned about using Segwit.