I'm also interested to know I haven't tried it yet but someone answered your question in your previous thread.
Check them here https://bitcointalk.org/index.php?topic=5487691.msg63769874#msg63769874

I heard that it only works on the latest version if your current Bitcoin core is v21 you might need to upgrade it to the latest version to make sure the unsigned PSBT generated from Electrum will work on Bitcoin core.