I call it rather maintenance, I’m not really a dev 
But aren’t those all related to the Athom CLOUD based integration ? So Rate limit error is related to the Cloud API restrictions of TP-LINK. This app in this thread is for devices with enabled LAN control - have you tried to add those devices after installing this app with their IP and enabled LAN control (if available) ?
From the list, those could work (my assumption as I do not have those devices) :
2xKP405 , 4xHS103 , 1xHS105 - you can try to add them just by selecting HS100/110 (depending if those have power measurement or not)
3xHS300 - might require much more work due to the subdevices
But…
4xKP125M - of those are Matter Plugs, why not to add them as Matter devices ?
8xEP25 - not sure, seems those devices require additional authentication, you may try to ask in the TAPO thread - [APP][Pro] Tapo - #19 by Jos_van_Vliet
