Disable username login and force email login

Is there anyway to disable username login and only allow login with entering email?
because of security..i have forum and username-as are visible and hacker can easier hack account or guess password by using their username

is there way to allow login only by entering email + password (disable login by username)

i know this is not change-able via theme because its woocommerce login but if you knonw way how to do it or at least any help in which way i should look to do it..i would appreciaite it very much

i treid googling but i found nothing…neither one plugin does it

and how to add GDPR privacy policy checkbox when user comment on Woodmart Blog
for following GDPR before posting there should be checkbox that is required to mark

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