Since updating to iOS 15 public beta, I noticed that Internet access is unavailable while connected to Blokada+.
I have checked other possibilities to confirm that only being connected to Blokada+ through the app is causing this:
Changing DNS servers
Changing VPN server location
Deactivating lists (using OISD and DDG Tracker Radar)
Using Blokada+ through the WireGuard app works at the moment as well as only using Blokada as a blocker.
Device: iPhone XR
OS: iOS 15, Public Beta 1 (19A5281j)