Miscellaneous
Cherrywood and Mysterywood Trees currently do no generate naturally in the 1.18.1 version. They will be readded and overhauled in one of the next updates.
You can however still buy both Saplings from a Wandering Trader.

Cherrywood

Cherrywood tree generate frequently in Plains biomes. Their wood makes a great building material.

Mysterywood

Mysterywood tree only generate in Flower Forest biome, and their leaves have a chance to drop Golden Apples.

Edelwood

Only generate in Dark Forest and Dark Forest Hills biomes, the log can be crafted. Smelt it in a furnace to get Dark Matter.

Arcane Dragon Egg

It's a decoration for the moment that you can place by right-clicking (it may have a utility in a future update).