No snacks..
But also, no loading her plate up with questionable stuff either, and no telling her to eat, encouraging, pleading etc etc.
Offer a selection of things for her to put on her plate herself - some she will eat, some she hasn't tried yet. Don't supply SO much of anything she will eat that she eats JUST that and is actually over full..
Then leave it alone. Either sit and eat yours with her or ignore whatever she is doing, but do NOT comment.
Prepare her for the end of meal time with some time frame she can understand so she doesn't just sit there all day in front of food she doesn't want - so 'OK, 2 more minutes and then dinner times done and we can do x..' or whatever she grasps.
If you do offer dessert type things - put them on the table, it really doesn't matter what order she eats in.
So if she'd eat crackers with spread, banana slices and cheese sticks and yoghurt.. put those out, plus some veggie sticks, cheese sandwich cut up small, hard boiled egg cut into bits, bits of ham... and then leave her to it.
Most of that can be portioned out and put away if she hasn't touched it so it shouldn't be particularly wasteful.
I have ARFID, and a sliding hiatus hernia and i was subjected to a variety of methods (Some of them frankly abusive) as a child to make me eat things I really really did not like.
Even things that seem mild like if you don't eat it, the only other option is dry toast (something else I hated!), or 'just try a mouthful' or 'one bite of this and you can have pudding' - they just added MORE stress to mealtimes that made matters worse.
The end result is i have serious issues with food that have seriously affected my health, and they're still with me at almost 42 years old!