Will your device be more fluid if you use apps designed by the phones manufacturer? Ex i have the Note10+ I've been using Gmail just because I had it on the last device along with other non Samsung products.
Google second party apps will work and be optimized just as well as Samsung first party apps are since they are designed to work the same across most Android devices seamlessly.
I use the Gmail app is my default/primary email client. After enabling notifications to come to my Note 10+ I get notified on all my emails just fine.