1.20.5/1.20.6 update:

chest boats:

• Chest Boats when used as a crafting ingredient will output an item that turns into a chest and the normal boat in your inventory
• added support for cherry chest boat and bamboo chest raft
• old method was removed

Minecarts:

• Minecarts with blocks when used as a crafting ingredient will output an item that turns into the block and the normal minecart in your inventory
• old method was removed