Thanks to Florian Wortmann and thetearex for testing/live solving this puzzle and giving their precious feedback.
EDIT : I've included an explanation of the intended solve path, as a hidden comment.
F-puzzles - CtC app - SudokuLab - Penpa+
Normal Sudoku rules apply : Fill the grid with digits 1 to 9 appearing each eactly once in every row, column or 3x3 box.
Solution code: Digits from Row 6 (left to right) followed by Column 6 (from top to bottom). 18 digits, no space character.
on 3. October 2021, 01:27 by DanMeehan
This was easier than I first thought it might be. Thanks!