anyone successfully managed to import chat history from one instance to another? heard it’s possible, don’t know of anyone actually doing it.

what do you consider importing?

you can invite another account of yours into the DM room. then export all encryption keys in your old account, and import them in the new one, and now you should be seeing your old encrypted messages. if the room stopped being treated as a DM room after the invite, you can kick your old account and execute the /converttodm command or something like that in element web.