Hi @Cqc,
This method does use inbound port 443. There is a slight chance that you’ve found a bug in Certbot in terms of its ability to reconfigure your Apache appropriately, but more likely in these situations is that there is some other firewall or network configuration that prevents inbound connections on port 443. Another possibility is a DNS error, or a DNS AAAA record advertising an IPv6 address that is not actually routed to your server.