IPsec "tunnel settings" GUI is now deprecated and manual migration to the "connections" GUI is recommended. An appropriate EoL announcement will be made next year.
We're collecting improvements for connections here https://github.com/opnsense/core/issues/6279 and I expect movement on this as soon as people try to migrate their setups... which is about now..FWIW, the tunnel settings are going to be there for another year for sure, but now we'd rather only improve the connections bits.Cheers,Franco