error 400 "no route" when try to zap you

Looks like there's no public channels on your node and no route hints in your invoices if the channels are private

There's supposed to be a setting to enable hop hints for private channels in btcpay if you do have private ones

https://mempool.space/lightning/node/0362c18e4406b951e0c1b08377a3f4b404fe20025e10e42daecbc06f915b24ca08