There are quite a few mods available in Minecraft, and they are usually restricted to the Java Edition. While behavior pack add-ons can change the way Bedrock Edition runs, mods can do so much more.
Mojang Studios is hard at work on 1.18 'Caves and Cliffs Update' Part Two, which hopefully arrives later this year. Before 1.18 changes can be tested with regular snapshots and betas, Mojang Studios ...