SExcel Lambda function to stack two arrays horizontally

appendrangeh.txt

//from <https://exceljet.net/formula/lambda-append-range>
//stack arrays horizontally
APPENDRANGEH = LAMBDA(range1, range2, default,
    LET(
        rows1, ROWS(range1),
        rows2, ROWS(range2),
        cols1, COLUMNS(range1),
        cols2, COLUMNS(range2),
        rowindex, SEQUENCE(MAX(rows1, rows2)),
        colindex, SEQUENCE(1, cols1 + cols2),
        result, IF(
            colindex <= cols1,
            INDEX(range1, rowindex, colindex),
            INDEX(range2, rowindex, colindex - cols1)
        ),
        IFERROR(result, default)
    )
);