I can't compliment my woman enough either. I am not sure any guy can. We can only do our best.
We can always do more compliments while the relationship is in good shape. The issue for you is you are in triage. She might feel like you are doing it to manipulate her into staying.
She knows you better than anyone else on the planet. This is a big hurdle.
Making permanent changes to your behavior is all that you can do. She might like them, she might not. The bigger issue is do you like them? That is your measuring stick now. Only you can figure out what changes you need. Then you can watch your behavior and see if you are behaving the way you want.
I share what worked for me. Others here share what worked for them. I used the "learn dirty talk" as an example. You said you are already skilled at that. There are 1000's of changes you can make. What is attractive and seductive to woman in general? Her specifically? These are questions for you to ask yourself.
Same thing for the "dating". What would be fun and exciting? Make plans to go do them.
This is how I typically ask my lady out:
"I am going to (name the activity). Would you like to join me?"
You can test this out with your lady. Monitor her response. You should easily be able to tell if she is receptive.
During this phase, it is imperative that you avoid R talk at all costs. You just be. Be in the moment.
Take a look at how much non-sexual touch happens. You can "test" this.
"A Touch Charge is a loving physical gesture with your spouse. It's not foreplay or an advance for love making; it's just a warm touch for the sake of connecting in that moment."
Most around here do not advocate snooping to see if OM is an issue. IF OM is in the picture, it makes things a whole lot more complicated and the tactics are way different than if W is just done with the way the marriage is.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712