I use Magisk Delta with SuList and AdAway works fine for me.
On my second phone I use Magisk Canary (DenyList) and AdAway also works fine for me.
On both phones AdAway in the root mode with Systemless hosts enabled
Btw, you quoted one my old post - but that post was mostly an answer to some user who asked about the following module, not about AdAway:
Magisk module to block ads on android . Contribute to pantsufan/BlockAds development by creating an account on GitHub.
github.com
If you have a particular problem with AdAway (root mode), then please precisely describe what is your problem (and what is your configuration)
In my post you quoted, there was no particular problem with AdAway described (I only wrote generally "Some users have problems with AdAway") hence I don't see how to answer about the "resolution" for your "problem"
Ie, pls don't expect that people would roll out to the old messages, trying to find if there was some context at that time of my old quoted post or later (if you posted your problem at some point) to figure out about the problem you have
There might be a problem with Systemless hosts on some ROMs (it was discussed here).
Some Magisk versions do not support systemless modules.
Some users may have problem with Chrome or particular apps (not blocking ads), etc.