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If I am not missing something here, you could havea third/main function, with two different wrappers for it.

function wpse381184_main(){
    //do your thing!
}

function acp_editing_saved_usage1( AC\Column $column, $post_id, $value ) {
    // call wpse381184_main()
    wpse381184_main();
}
add_action( 'acp/editing/saved', 'acp_editing_saved_usage', 10, 3 );
function my_acf_save_post( $post_id ) {
    // call wpse381184_main()
    wpse381184_main();
}
add_action('acf/save_post', 'my_acf_save_post');

If you need wpse381184_main to use different arguments, you could structure it with the case with more arguments, and simply ignore it depending which hook called it by using the current_filter() function.

function wpse381184_main($post_id, $hook, AC\Column $column, $value){
    if( 'acp/editing/saved' ===  $hook){
        //do your thing in case A and exit!
        return;
    }
    // do your thing in "default" case B!
}

function acp_editing_saved_usage1( AC\Column $column, $post_id, $value ) {
    // call wpse381184_main()
    wpse381184_main($post_id, current_filter());
}
add_action( 'acp/editing/saved', 'acp_editing_saved_usage', 10, 3 );
function my_acf_save_post( $post_id ) {
    wpse381184_main($post_id, current_filter());
}
add_action('acf/save_post', 'my_acf_save_post');