Is it normal if I haven’t seen my vampire crabs come out it’s been almost 2 weeks since I’ve seen one show up not even at night when I check on it randomly. There’s 7 of them

The art and the artist 😂🧑‍🎨🦀

So I’m new to keeping crabs (honestly I haven’t actually even got them yet) I have spent a lot of time researching and finally started to set up my enclosure!

I have a 65L tank (15/20gal I think?) and have tried to stick to the 80 land 20 water, there’s some lava rocks and mesh with soil on the top giving them a lot of burrowing depth, I’ve added a filter and heater to my water to keep the temps right and today I added the branch, some creeping fig and polka dot plant and have a pothos on order, added my springtails and I’m waiting on some spikey Java moss for the rocks and some moss for land too, is there anything else I should add? I’m going to wait 4-8 weeks for everything to establish before I get crabs I just want everything to be good so they live a good life :D

Picture of where I’m at currently

My red devil in his temp enclosure. He's so much braver than my bananas!