I have an e-bike and have two locks on me most of the time. Both are kryptonite and I went on the kryptonite website and just filtered by the top two ratings and got one of the top and one of the second highest. I like having one chain that is on the longer side (with an e-bike because it it heavier it take more maneuvering to get it closer to the rack sometimes). The other one is a folding lock. I vary in how I lock it up- sometimes I lock the chain to the rack through the bike and one wheel and just lock the other wheel to the bike itself and sometimes I lock both through the rack. Depends on how long I am leaving it, how secure the spot I am locking it seems, etc.
I admit I obsessed over this when I first got my ebike but don't as much anymore (ie am more likely to briefly leave with only one lock), partly because I have it insured through my home-owners insurance and partly because I got it instead of getting a second car (I can carry two kids on it) and basically am at the point where I have saved money over having the second car enough so I would still be out ahead even if it was stolen and the insurance company refused payout for some reason.
I don't have one of these but I know many people like the wheel locks:
https://www.kryptonitelock.com/en/products/product-information/current-key/002321.html?type=bicycle
The wheel locks are nice because you can't drive it away if it is on even if you defeat the other locks and it is always on the bike.
The other think that is important is to have some sort of permanent box or bag on your bike to hold the locks (tube bag or a front box)- with an ebike the weight of the better looks doesn't matter as much and you can just throw them in easily.
I did some research and most bike thefts are crimes of opportunity so I also tend to lock it up in more trafficked areas (i.e. with lots of foot traffic) because more people around can be a deterrent. Also, most locks can be defeated if the person knows how so having different types of locks can help- if you have three u-locks a person who knows how to defeat those can just defeat them all but if you have a u-lock and a chain they need an axle grinder and a hinge point to get both of them.
Note that I have a secure (indoor) parking space at my house so I don't leave it out overnight- I would think that would require more thought if you wanted to do it.