Wish I had known vs wish i knew

[hatgray]

Is it correct to say,

1.) I wish I knew then what I know now.

I think this is also acceptable, but it would be better to use "had known". However, I always hear people saying the following as well.​

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2.) I wish you told me earlier.
3.) I wish you asked him yourself.

Is it appropriate to use simple past as well?

Thank you for your help.

Note: I have asked in this forum below but I need other opinions as well.

https://forum.wordreference.com/threads/wish-you-told-me.3368644/

 

[Rover_KE]

Answered in WR.

Thread closed.