How to disable\configure ipv6 for a single site on VDS?

Question

Debian

Hello!

Recently moved to VDS c Debian from kimsufi. I have a tool on the server that accesses an external service via an API. Only 1 IP and only ipv4 can be registered in the service. When accessing the service, I can’t get the data, since the call is made from ipv6, and not from the previously registered ipv4

. The server has ISP Manager Lite 5 and ipv6 is disabled in the settings for this domain (I understand that this may not be enough).

Tell me, can I disable ipv6 for a particular site? If yes, please tell me how to do it.

Thanks