Allowed for truly easy ipallowlist management, will say, a big boost would come to some documentation on how to abstract out lists into the Redis detail...
To any that get here wondering, following the "/" separator syntax, just have the first item be ".../0" and then ".../1" for the next item, be sure on updates you delete any key that won't be used anymore, and replace all from /0 -> last.
In the IPAllowList middleware scenario the full key might be:
traefik/http/middlewares/adminallowlist/ipAllowList/sourceRange/0
Then the value might be:
192.168.0.0/24
Hope this helps!!