The A flag is for AM/PM, which is completely unnecessary for 24- hour formats, which upper- case H stands for.
Either use 24- hour format, like this:
$date = date_create_from_format(
"l d F Y, H:i:s", // Upper- case H, but no A at the end.
"Wednesday 15 January 2025, 14:11:05" // Skip the "PM"
);
Or 12- hour format, like this:
$date = date_create_from_format(
"l d F Y, h:i:s A", // Lower- case h, for 12 hour format.
"Wednesday 15 January 2025, 2:11:05 PM"
);