Specs on iMX 8M Mini shows 1 USB 2.0. The carrier board Dahlia has 2 USB 3.0 and 1 USB 2.0. I assume the USB 3.0 works while using iMX 8M Mini, but I wanted to verify it.
Yes, Dahlia board has an USB3 port so if you insert a Verdin module which supports USB3 you will have it available on Dahlia. However Verdin iMX8M Mini does not have a USB3 interface available.