Yes there are. But not on the Bitfolk wiki. I have also found errors on each one of them or outdated information. , so I am attempting to document my journey through these to achieve a working nftables firewall utilising the new features with minimum code. There are many routes to the goal. The official wiki, for example, gives some example code which even if copied and pasted is rejected by nft. It also recommends one particular method of adding rulesets whilst discouraging another method, then because many of the pages are out of date uses the "bad" method. Nft is evolving quite fast, but some parts of the already published information has been left behind.
If nothing else it will give another choice to people wanting to try it