Last I checked they both can make calls now. Aside from perhaps lacking apps people want, you can probably get by with a Librem 5 depending on your needs - check youtube videos, people post them all the time particularly after updates.
I have a Pinephone and the phone calls work for me (Mobian).
Concerning Librem 5, they work too: https://source.puri.sm/Librem5/community-wiki/-/wikis/Cellul...
Not that I use the phone itself that much, I mostly use text-based messaging, but I don't want to carry two separate devices with me everywhere. If it's just for in-house use, I'd rather choose a larger tablet than a tiny phone.