It's not clear to me if dropping support for this functionality was intentional.

Chain of events:

- #21689 removed test coverage due to a misunderstanding due, I believe, to this functionality being generally supported by all platforms except macOS which does not and returns a different format
- #21756 removed support and caused this regression
- #21690 restores the test coverage that would have caught this regression

Currently, neither the test coverage before #21689 nor the coverage restored by #21690 pass since the merge of #21756.

{
   return m_net == NET_INTERNAL;
}
bool CNetAddr::IsAddrV1Compatible() const
{
    switch (m_net) {
    case NET_IPV4:
    case NET_IPV6:
    case NET_INTERNAL:
        return true;
    case NET_ONION:
        return m_addr.size() == ADDR_TORV2_SIZE;
    case NET_I2P:
    case NET_CJDNS:
        return false;
    case NET_UNROUTABLE: 
    case NET_MAX:        
        assert(false);
    } 
    assert(false);
}
enum Network CNetAddr::GetNetwork() const