I would never buy a built-in Ody vacuum. Way too weak for me when I tried one at the dealer. Plus, as others have said, there's enough battery drain issues with 2018+ Odys that it doesn't make sense to add more battery drain for a built-in vacuum.
I have a Ridgid 9 gal, 18volt, cordless shop vac that I bought from Home Depot for $119. Came with 1-7/8" diameter x 7 foot hose, 3 accessory tips and 3 straight extensions. Does not come with a battery or charger so I had to buy those separately.
It is a very powerful shop vac. The suction and blowing power matches my corded shop vac that died. Couldn't ask for more suction or blowing power. I use it to blow sawdust on the floor out of our carport after I do some wood working. Much better than sweeping the floor. Use it to vacuum our 2019 Ody EX and it does a great job at that. It's a joy not to have to manage an electrical cord while doing those chores. Is worth every penny and I could NEVER go back to a corded shop vac.
When my Craftsman oscillating multi-tool died, I bought a Ridgid 18 volt multi-tool since I had the Ridgid battery and charger. That multi-tool is very powerful and cuts through 20 penny nails like butter. Much faster than the Craftsman multi-tool that died. Probably because the oscillating back & forth travel is greater than the Craftsman's was.
Bottom line, consider buying a powerful vacuum cleaner instead of a built-in Ody one.
$.02,
Raptor88