There is games available but just not visible. Additionally, I had played expansion and had a similar issue. I had used a VPN to see other games in other regions. That is a nuisance to do. Whatever restricts players from finding games in different areas I think is restrictive especially for Classic. It used to be in Diablo II we at least had chat channels to be easily accessible such as “HCCL” where players would meet for classic and such.
Thank you!