Not sure if this is exactly what you had in mind, but if you're up for experimenting it's worth a try:

https://cooking.nytimes.com/recipes/12363-lemon-pudding-cake

I've made it with almond milk and it was really good. And a non-dairy butter to grease the pan, of course. The texture is sort of like a molten chocolate lava cake, but not as heavy.

https://minimalistbaker.com/creamy-vegan-lemon-bars/

There are also a very local dairy free/GF/vegan bakeries that have some delicious lemon bars.

Minimalist Baker usually has some great recipes to try.

Trader Joe’s actually makes a decent vegan cheesecake. There are some recipes that use silken tofu. Personally cheese replacements make me sad so I stick to vegan baked goods.

Great British bake-off this week had people making non-dairy mousse or something like that.

I can’t figure out how cheesecake could be dairy free, but any lemon meringue pie should be pretty easy to do? E.g. https://www.allrecipes.com/recipe/15093/grandmas-lemon-meringue-pie/ but with nondairy butter. (I haven’t made this specific recipe but it looks pretty standard?)

I would love to explore recipe options and experiment with flavorful lemon mousse or lemon cheeesecske without upsetting my gut and liver. Does anyone have a good recipe to share?
Thanks!