Are my hard drives encrypted?

New to Ubuntu Server, please forgive my ignorance.

When I installed Ubuntu 18.04.2 LTS Alternative. I selected “Guided – use entire disk and set up encrypted LVM”.

I now am adding two hard drives with RAID 1 configuration. Will these be encrypted by default or will I have to use LVM to encrypt them?

If I need to encrypt them, does anyone know of a good guide. I’ve been searching all over the web but only see guides for old versions.

Any help would be greatly appreciated, thanks!