I was trying to find a post where I linked a few different bowls. Ah well, here's an Amazon search you can check out. Chewy has some, too, but fewer options than Amazon: https://smile.amazon.com/s?k=dog+slow+feed+bowl&ref=nb_sb_noss
Without knowing how big she is / will be, here's one that's very similar to what I had for Momo. I liked how some of the food stuck in the "petal" so he had to work to get those last little bits. He would eat potato skins in 3 chomps as a reference for his speed. His bowl was a bit smaller (he at 1.5 cups each feeding): https://smile.amazon.com/dp/B082KB7PC8/ref=twister_B08BFY7MCP?_encoding=UTF8&psc=1
There's also the Kong Wobbler and since you're already separating the dogs it could be worth a look: https://www.chewy.com/kong-wobbler-dog-toy/dp/44195
Fair warning - it makes a lot of noise on hard floors. I've had to show each dog how to use it and they've all caught on quickly.
If you have patience and time, this is another favorite around here: https://www.chewy.com/ethical-pet-dura-brite-treat/dp/180973
It takes a while to load the kibble, but keeps them busy. Sometimes I'll put a handful in there and the rest in the Wobbler just to change things up.
This one is the same as the toy above - takes a little effort and time to get the kibble in there, but another well-liked treat toy: https://www.chewy.com/petstages-orka-tire-tough-dog-chew/dp/46935
And finally, our easiest toy. Easy to fill, easy for the dogs to empty, but still slows them down and so far has stood up to extra chewing: https://www.chewy.com/jolly-pets-monster-ball-dog-toy/dp/38809
I like this one as well, but Gertrude chewed the inside up. I made the mistake of thinking she had the hang of these toys and had grown out of that break it phase, but nope. She normally ignores the toys after the food is out so who knows what compelled her. However, I'll give it another try some day because it was a good one. https://www.chewy.com/planet-dog-orbee-tuff-mazee-puzzle/dp/38750
And then there's the good ol' placing piles of food around that she has to find. I don't know what type of space you're working with, but I'll put the idea in the hat just in case you can make it work.
Oh, and if she won't destroy a snuffle mat that's another option. Mine will tear it up if I'm not monitoring.