The Framework-16 does have touchscreen signals present on the display connector.
This panel isn’t a touchscreen, but we have the necessary signals on the connector on the Mainboard to enable one in the future.
A difficulty with the Framework-13 is that while usb and i2c touchscreen signals are available on the motherboard display connector, you’d need a custom cable to break them out. It would have been much easier if they were also broken out to a separate connector. Since all high-resolution 40-pin eDP panels with touchscreens seem to have the touchscreen signals separate.
So basically, on the Framework-13, you can not easily swap in a touchscreen at this time.