Make sure to save your profile after adding the rel-me link to your web page! The verification process is triggered when you save your profile, and may take some time before completing. If you have added the rel-me link and verification is not working, then try daeleting the link, saving, re-adding the link, and saving again.
@Kushi yes, I did it in the way shown in the description. Several times I added my URL https://johnny-b.000.pe/ to my Mastodon account in the profile.
Any ideas from your side?