In the 'mixed blessing' that is the wiring in my August 2021 build 5.0 I was (pleasantly) surprised to find ETI using 'WAGO' connectors in a few locations. This a pic under the DS dinette bench ... a rather 'nasty' hank of zip-tied wires, but hey, buried in there are 3 blocks of multi-port WAGO connectors ILO something else (these are trailer 'exterior chassis lighting' circuits).
No, I've not found any wire nuts installed by ETI yet
(nor have I investigated close enough to try to determine if the 'WAGO' connectors are genuine or knock-offs)