Through a custom addon and manually converting a bunch of redstone, Decked Out 2 is working!
The map works perfectly (relog once to get the map to load!), and everything from Decked Out 2 is converted -- cards, treasure, wearable easter eggs, even Tango's Hood! The only things missing that I know of are trophies (phase winners, game winners).
I also added all ported items to the "behind the scenes" area by the Easter Eggs if you want to check it out.

I also..... added Hermitcraft TCG, because why not! I brought in the TCG Shop, Citrus Arenas, Doc's, Cubs, and Xisuma's arenas. The maps don't work perfectly, but they're pretty good -- the only things missing are Cub's pharaoh card and the TCG trophies.

Note 1: This is a resource-intensive world, especially on RAM. I strongly suggest that you upload the world to a realm or server (this has been tested on a low-power 2-player realm) to get the best performance, or otherwise understand that your device may struggle.
Note 2: There may be bug-fix versions added to the drive in future. I'll release a youtube video if there is an update. To update, re-download the world, and then go to the Behind The Scenes area and get your deck back.

Download Direct from Here -- Install as a .mcworld as usual, addons come pre-installed.
Video with Additional Instructions as Needed: https://youtu.be/VkmzoJUdCg4
Decked Out 2 Tutorial: https://www.youtube.com/watch?v=aoVVCwx6k1w
TCG Arena Usage Guide: https://www.youtube.com/watch?v=Fe9nyVda4AM
Hermitcraft Reddit Post: https://www.reddit.com/r/HermitCraft/comments/1aej1n5/decked_out_2_and_hermitcraft_tcg_on_bedrock_how/
Thumbnail Credit: https://www.reddit.com/r/HermitCraft/comments/18tx11k/deepfrost_citadel_in_all_its_spooky_glory/