WELCOME! So cute!!! Congratulations!! Your set-up looks cozy and they sure look comfortable in there. As long as they get plenty of exercise for a minimum of three hours then that should be okay. If they don't get that much exercise, then you may want to expand it a bit.
I don't see a hay rack though, so unless I missed it, I suggest adding that. Hay in their litterbox is great, but it can get urinated on, so you could put a hay rack over their boxes to keep hay fresh and dry but still where they can "poop & eat" since bunnies love to do both at the same time. Or you can put hay in their box and a hay rack some place else.
Also, the hidey box - can they both fit in that? I know they will be growing, so you may opt for something bigger - just be sure to position it so they can't use it to jump out.
Chew toys and things to keep them busy are important too (I like the wood chew and carrot) - but don't put everything all in at once, switch them out so your bunnies don't get bored. I know you may already do that, just FYI. Also, toys are really trial and error. Scarlet had some good suggestions - paper bags filled with hay and some their pellets are fun too (poke holes in the bag so they can smell it better) Cardboard rolls from toilet paper or paper towels can also be fun. You can also fill them with hay.
OH, just another FYI, when they reach sexually maturity soon, don't be surprised if they change a bit, they may even fight as females can get extremely territorial with each other as their bodies are telling them to defend the best "nesting" area for future litters. So, just keep an eye on them as they reach 3 - 6 months
Are you planning on getting them spayed when they are at the right age?