Thank you for your feedback.
Are you referring to RCS? If so, RCS is currently supported in Samsung Messages app for certain carriers. However, RCS support overseas for non-US carriers is currently not supported.
We appreciate your contribution to the Beta Program.
One UI Beta Program
Please work carriers to ensure backport as well. RCS support is still spotty even on slightly behind devices like the S20 and 21 AT&T only supports it on carrier locked devices. Unlocked devices have spotty support even with Carrier Serivices installed. ITs a mess. Spend 1k dollars on a phone and something this basic does not work but the S10 unlooked is supported by AT&T.
Please work on this