This isn't a BG3 thing, it's a video game thing. Video games always have much shorter ranges than tabletop because people really don't understand just how far a longbow can shoot. For example, in BG3, if you wanted to use the longbow at maximum normal range (not long range), you would be so far from the enemy you'd leave combat/not be able to see them.
The game isn't set up for proper tabletop ranges, and it's not something that's going to get fixed; it would require a massive overhaul not just of the combats, but also the maps.
In that case balance the movement distances to match the short ranges... like halve them, since that is essentially what most ranged effects are getting (except longbow which is still 15 feet short of half 150/2=75). So put movement that normally is 30, at 15, etc..
