Fail on DKIM however the public key is present

It shows my DKIM is not vailed: https://i.hido.tech/F0FXMp https://i.hido.tech/0XApYc
However, my public key is present: https://i.hido.tech/sOHkEX https://i.hido.tech/H2jjMT

Anyone may help me out how I make DKIM is vailed?

Thank you in advance

idem