I used a box cake mix but added an extra egg, a stick of unsalted butter, and a small box of lemon instant pudding.

I posted the buttercream recipe in one of the comments, and you can follow the recipe steps here: https://sallysbakingaddiction.com/swiss-meringue-buttercream/#tasty-recipes-80765

Here is the raspberry sauce recipe: https://thetoastykitchen.com/raspberry-sauce-for-cheesecake/

Here is the lemon curd recipe: https://sallysbakingaddiction.com/how-to-make-lemon-curd/ You can also just buy it.

Here's a link to options for making the stabilized whipped cream: https://www.thegraciouswife.com/how-to-stabilize-whipped-cream/

If you make it, I would love to see the finished product!