the point I'm making is that an exemption is NOT a visa. An exemption can be extended once (though, during covid, normal rules may not apply and multiple extensions might continue to be possible - but don't bank on it),
As a technicality, it's NOT "visa on arrival". You'll be there without a visa - but still need all the other bits and pieces. Take the time to trawl back through this group and you'll read all the info - several times.