When Samsung announced the Galaxy Note10 a couple of weeks ago, it also boasted its strengthened partnership with Microsoft. The Note10 includes improved Your Phone integration with its Link to Windows feature.
As it turns out, Link to Windows is coming to more Galaxy handsets as spotted by XDA Developers in a leak of One UI 2.0. According to the leak, it will at least be coming to the Galaxy S10 series, if not more than that. It does seem likely that the S9 and Note9 series would get the One UI 2.0 update as well, and that Microsoft would want the feature to be on as many handsets as possible.
The Link to Windows feature shows up right in the Quick Settings menu on Galaxy Note10 devices, allowing users to easily toggle the Your Phone connection. Users are also finding that screen mirroring works with any PC if you're using a Note10, rather than the select few PCs that are available for other smartphones.
It's unclear when One UI 2.0 will be released, but it's not going to be for a little while. One UI 2.0 will require Android 10, which isn't even out yet for Pixel phones. For Samsung phones, it tends to take much longer.