Okay, being able to go into the recovery mode is a good thing I would say. Did you search on XDA forum ? For example : https://xdaforums.com/t/hard-brick-moto-g30.4397117 and https://xdaforums.com/t/bricked-motorola-g30.4716793 could be useful to read ?
Haven’t used this services but I keep seeing other people talking about it. From their FAQ : https://jmp.chat/faq
The easiest way is to make a call from your Jabber app, if you are using a supporting app such as Cheogram Android, Conversations, Snikket, or Movim. Simply add a contact just as you would for messaging and then select the voice call option in your app.