Router 4G/5G by signal strength

I have RUTX50 on a ship sailing mainly in France. Signal strength and speed of 5G is sometimes lower than 4G, but router selects 5G anyway when available. I can set preference for “4G only” but then when the ship is moving, 5G is not used even if stronger/faster than 4G. (3G is not available anymore in most areas).
Would it be possible to set an additional preference for “Strongest Signal auto” along with the existing choices of 5G/4G/3G auto, 4G/3G auto, 4G only, 3G only?
This could be very usefull for use on moving vehicles (ship, camper van, coaches, maybe even trains…)