The Asset Type scanning target indeed has no configuration option to skip the SSH protocol during scanning. The IP Range scanning target does have the option to enable the No SSH option to skip the SSH protocol during scanning.
If you wish to use the Asset Type scanning target and ensure that your assets are not scanned through the SSH protocol, you could consider blocking/closing the SSH port for these devices. Do keep in mind that in that case, Lansweeper will need to rely on other protocols to retrieve asset information, which might yield more limited information depending on the device type.