Just curious but would the Ecohitch be strong enough to hold up 2 ebikes on the Hollywood Sports Rack bike trailer? It'll be a few hundred pounds pushing down on the hitch. I'm not familiar with hitch ratings or anything like that, my previous vehicle was a sequoia that came with a hitch so I wasn't too worried. I've never done an aftermarket hitch receiver before.
I don't have Ecohitch but its capacity is spelled out in the listing.
This 2021-2022 Toyota Sienna trailer hitch by EcoHitch™ features our hidden design which is the only Toyota Sienna trailer hitch available that does not block the kick sensor. Let’s face it, the reason you bought this vehicle is for the convenience of opening the hatch with the wave of your foot...
torkliftcentral.com
"This Toyota Sienna tow hitch is rated for 525 pounds tongue weight at the trailer ball and 3,500 pounds towing weight.".
Length of the bike extension arm also affects the weight that gets applied to Tongue. If the extension arm is long and puts the bike farther back, its limit will be less.
Edit: 525lbs is your upper limit. Looks like the bike rack you mentioned is about 56lbs, and it can take 2x80lbs bikes. You will be way under its capacity.