Thank you very much for your prompt and very helpful response!
I will have a look at the options and consider the IR-JSON too, maybe I just need some infrastructure on my side and the possibility to connect to it from the WLED in another household.
More use-cases other the one above would be necessary to justify further exploration of the feasibility of an interpreter within WLED.
PS:
This is really cool! If I link our networks (VPN) then this would be easily accessible.
Even simpler:
Using AP-mode and connecting when the season comes and go for a cup of tea there.