Thanks, we have confirmed that toolchains manually installed for all users (as opposed to the current user) won’t automatically appear in the VS2022 toolchain selector until you manually use the “Select a third-party toolchain” link. This is a side effect of VS2022 being a 64-bit process. Toolchains installed directly via the toolchain selector should still work.
We have fixed the issue on our side and will include the hotfix in the upcoming VisualGDB 5.6R3. As a workaround until then, please consider installing the toolchains for the current user only, or locating them manually via the dropdown in the toolchain selector.