Counting on Quiet Knights: Jolly Rogers creates what I believe is another miracle Sudoku

Today's Video:

Throughout the puzzle I kept wondering how this puzzle solves. Jolly Rogers knew what he / she was doing and we ended up with one fabulous puzzle to savour!

Link to Play:

Counting on Quiet Knights by Jolly Rogers https://link.sudoku-sleuth.com/CountingOnQuietKnights

Rules:

Normal Sudoku rules apply.

A digit in a circle indicates how many times that digit appears in a circle.

Also, digits in a circle must differ in value by at least 5 with every cell a (chess) knights move away.

Digits in a grey square must be even.