My top advice is 'Get Fit' having a toddler in a ski resort is exhausting.
Most staffed chalets do 'high tea' around 5pm & staff are usually pretty happy to cook whatever your DC will eat IF you let them
know on the booking form (their budgets are incredibly low and if they've spent it on the usual high tea provisions they have to grovel for more funds (usually refused) or spend their own money in hope a tip covers the cost)
Self catering chalets are great in some ways, but not in others (mainly catering)
Personally I don't think you need to look for many additional things in resort as snow provides endless fun!
However, if she likes the water and you're looking at hotels- check the prices of ones with pools
Even more important to check out drying room facilities
It'll save you money if the accommodation has sleds etc
Also if there anything you really feel you need cot/highvhsir etc you need to book it in advance, don't sssume they'll be there. It can be a bun fight on arrival getting one of the 2 cots the company has in resort.
As cute as the idea is of taking her, would you not all enjoy the week more if she stayed with grandparents. 🤣