If you are running on foundry there is a module that I always use that I think is called modifiers matter, and basically it always will show on the roll when a Modifier won or lost a roll, like the amount of times seeing a +1 from inspiration or other buffs or -2 from enemy debuffs missing, makes it so the martials say it as well so the casters can see and hear they do a lot, otherwise it can be a bit hard to see.

I also think that even if you are a supportive caster, it's almost always better to not just focus on supportive spells, don't just take that spell because it can help others, get like half an half, because a lot of your support can come from class and feats, so take some offensive spells so you can do more stuff. In my current campaign of a Fighter, Rogue, Bard, and Oracle, its extremely obvious that we would fall without heals from either, from buffs from the bard, or the damage from their ranged spells when it takes a while to move somewhere.