You definitely need a DC-DC charger for charging from your alternator. The LFP batteries will take as much as the alternator can give and will shorten the life of most alternators. Sometimes very quickly. For solar, you need a charge controller anyway and it's best to use an MPPT charger. For shore charging, most of the newer converter chargers have a lithium setting. I had to upgrade my Power Dynamics Mighty Mini to charge the LFP battery. If you have a new camper everything should be LFP capable, except for the DC-DC controller. Those are usually not included in campers.
And also if you have an LFP battery you are going to want an inverter. That was the very last thing I bought. I kept convincing myself I didn't need one but now that I have it I feel foolish for resisting getting one. It's really nice having a bunch of home cooked meals ready to reheat in the microwave and being able to do it without firing up the generator. It also makes every day living so much easier in my rig, which was already wired for AC.
On those trips where it has been mostly overcast and we've been using more juice than we made, we can fire up the generator and take a hike for an hour and come back to a battery that has an additional 50AH in it. But I haven't had that happen since I upgraded my panels.
