/Customride command

So you know that there's a /ride command, but that only allows mobs to ride what they can ride. This command's idea is that you can force mobs (and players, of course!) to ride each other. You can make this in java edition by doing /summon <Entity> ~ ~ ~ {Passengers:[{id:<entity>}]} but I'd really like this in bedrock edition. The syntax is below:

/Customride <target/targets> ride <entity>