Then maybe you’re okay.

A number of people can see your IP, people will chime in and add to ane remove from this list:

Can’t see it:

• Random people you personal message with
• Random people you chat with in rooms

CAN see it:

• Server admins
• People you share (send/rcv files with) // this may have been fixed
• People who send you links and you click them, but this isn’t specific to Matrix, it’s a tale as old as time.
• You voice call with someone (may have been fixed)

Some info may be wrong. But having someone’s IP in the days of routers and all filtered ports means little, unless you piss off someone who knows some low level customer support person @ your ISP to pay to get your account info. Or you’re dealing drugs in which case use TAILS and stop fucking with technologies you don’t know the specifics of.

If they knock you offline and you can’t access anything at all, unplug your router AND MODEM (most importantly your modem) for an hour. Go touch grass for an hour. Widdle a wee branch. Plus your boxes back in and you’ll be bright as new.