This, and past performance (blabbing to an American network interviewer about his 12 minutes with HM last time he was in London) is probably why Charles isn't (allowed to?) meet with Harry:
The Duke and Duchess of Sussex, Prince Harry and his wife, Meghan, have agreed to visit Nigeria at the invitation of the country’s Chief of Defence Staff, Gen. Christopher Musa.
British High Commissioner in Nigeria, Dr Richard Montgomerry, disclosed this in an interview with the News Agency of Nigeria in the course of his courtesy visit to the Managing Director of the agency, Malam Ali M. Ali, in Abuja.
He said, “It’s great that the Duke and Duchess of Sussex are visiting Nigeria, which I understand is at the invitation of Defence Headquarters.
“But they are visiting in a private capacity, not an official one.
“So, the British High Commission is not involved in arranging or facilitating their programme.
“They are not representing the work of His Majesty’s Government on this visit.”
https://punchng.com/prince-harry-meghan-accept-invitation-to-visit-nigeria/#google_vignette