Hello,
I have the same problem with ACF (Free). I need to add some fields to My Account Page, but I think that we need something like: Page -> is equal to -> Edit account.
This feature, maybe is not supported by ACF and we need to get an Addon.
Check this thread: https://support.advancedcustomfields.com/forums/topic/addon-for-woocommerce-my-account-page/
