I've posted in several Facebook groups and I get the same answer of Crassula Ovata. I own several Jade and do NOT believe that this is a Jade or at least not one I'm familiar with. The leaves are way larger than my Jades and are really concave or cupped and older leaves begin to really curl under. I also added a couple photos next to my Ovata for comparison to how much larger the leaves are. I'd appreciate any help. Thanks. (This is from a leaf propagation, growing approximately a year)(Sorry for the double pictures. This is my first time posting)

It might be a Kalanchoe.

It could be another type of succulent but it sure looks like a juvenile Jade Plant (Crassula ovata) to me. In nature, they grow to be good sized shrubs and are beautiful when in full bloom! Leaves can attain a red hue during cooler months and when grown in high light:

I've been collecting succulents for quite some time and I also thought it was a Jade in the beginning. The more it grows the less I believe it's a Jade. The leaves are totally different than any of my Jades. Someone told me maybe Praealtum and it resembles it a little. It's in FULL sun every day and gets absolutely no other color other than the light green. It's even way lighter than my Jade leaves. This is already in a 6" pot.

Another possibility might be Trailing Jade (Kleinia petraea)

I have trailing Jade as well. It's not that either.

Well, probably not Kleinia then, as that one gets pinkish leaves when grown in high light:

It doesn't resemble any Kalanchoe I've ever grown but @purpleinopp Tiffany may recognize it. I think she grows a few Kalanchoe.

My trailing Jade gets really purple. For being such an immature plant the leaves are really, really large. As much as I want to say it's a Jade, all my experience owning Jades keep me away from saying it's a Jade. ☹️☹️🤔🤔

I don't think it's a kalanchoe either. I'm really stumped. The leaves are really cupped/concaved. Nothing like my Jades.

Hi & welcome! TY for the shout-out, Lin. :+)

With pairs of opposite leaves, it can't be a Kleinia/Senecio.

It looks like Crassula ovata to me. The older leaves look like they developed in a lot less light, causing them to curl and point down at the tips to expose more surface area to the lower light. Lower light can also contribute to larger than usual foliage on many plants, in attempt to capture more of the less intense light.

...and keep in mind that there are about 349 other species in Crassula genus. I've never seen most of them, and some are probably quite similar to C. ovata.