With subdomains yes. So same onion like page1.
Discussion
Could customize over clearnet with a reverse proxy like Im doing with mine. Example:
Pay.sdbitcoiners.com
Thanks. I don't know how to do a reverse proxy yet. It's something I've always wanted to learn.
Here's a guide. I changed it to add other services but works well as is for btcpay.
https://docs.btcpayserver.org/Deployment/ReverseProxyToTor/#reverse-proxy-to-tor