No, you have to first install /e/, then install the application magisk .APK from there :
Release Magisk v25.2 · topjohnwu/Magisk · GitHub
When installed, Follow the instructions relative to your device :
Installation | Magisk
boot.img to be patched by magisk app is extracted from the /e/.ZIP (my case using old samsung)
Sorry, but I don’t know OnePlus devices nor A/B devices…
In your case, i don’t know, if the recovery.img to patch using magisk app sould be TWRP, or “
recovery-e” .
BUT according to the documentation, you need to use fastboot to flash the patched.IMG to the device, not TWRP
(patched file is generally foundable in your /download folder)