I have these exact same warnings, plus one for the tyre pressure monitoring system and one for bend lighting, on my GTI currently. It started about a week ago and was intermittent at first - sometimes they'd appear at start up, sometimes after 15 mins driving, then they might clear themselves and reappear etc. Now they appear at start up and stay lit.
It went into my local specialist, whose immediate reaction was ABS sensor issue. Sure enough they diagnosed the right rear ABS sensor not reading at all and the left rear reading intermittently. Parts were on back order, so now waiting for them to arrive. Expecting it to be about £250-300 job.
Ok to drive in the meantime, just being careful without ABS. No parking sensors is the most annoying thing!