Google Sheets duplicating rows by splitting comma separated multiple values - google-sheets

Question

I have Data in Google Sheets Where multiple Dates are mentioned in single column. I want to separate the Each date and same row should be repeated for each date.
I would appreciate your help.
Trying with this but its not working.
=ARRAYFORMULA({"DATE","EMPLOYEE NAME";QUERY(IFERROR(SPLIT(FLATTEN(IFERROR(Sheet1!A:D
&CHAR(9999)&SPLIT(Sheet1!H:H,","),)),CHAR(9999)),),
"SELECT Col2, Col1 WHERE Col2 IS NOT NULL ORDER BY Col2 ASC",0)})
Sheet Link
I tried with this but its not spliting the dates.
function result(range) {
delimiter = ","
targetColumn = 8
var output2 = [];
for(var i=0, iLen=range.length; i<iLen; i++) {
var s = range[i][targetColumn].split(delimiter);
for(var j=0, jLen=s.length; j<jLen; j++) {
var output1 = [];
for(var k=0, kLen=range[0].length; k<kLen; k++) {
if(k == targetColumn) {
output1.push(s[j]);
} else {
output1.push(range[i][k]);
}
}
output2.push(output1);
}
}
return output2;
}

Answer 1

try:
=ARRAYFORMULA(QUERY(SPLIT(FLATTEN(
A2:A11&"×"&B2:B11&"×"&C2:C11&"×"&D2:D11&"×"&E2:E11&"×"&F2:F11&"×"&G2:G11&"×"&
TRIM(SPLIT(H2:H11, ","))&"×"&I2:I11&"×"&J2:J11&"×"&K2:K11), "×", 0, 0),
"where Col8 is not null"))
update:
=ARRAYFORMULA(QUERY(SPLIT(FLATTEN(FLATTEN(FLATTEN(
A2:A11&"×"&B2:B11&"×"&C2:C11&"×"&D2:D11&"×"&E2:E11&"×"&F2:F11&"×"&G2:G11&"×"&
TRIM(SPLIT(H2:H11, ",")))&"×"&TRANSPOSE(QUERY(FLATTEN(TRIM(SPLIT(I2:I11, ","))),
"where Col1 is not null", )))&"×"&TRANSPOSE(QUERY(FLATTEN(TRIM(SPLIT(J2:J11, ","))),
"where Col1 is not null", ))), "×", 0, 0), "where Col8 is not null", ))
or:
=ARRAYFORMULA(UNIQUE(QUERY(SPLIT(FLATTEN(FLATTEN(FLATTEN(
A2:A11&"×"&B2:B11&"×"&C2:C11&"×"&D2:D11&"×"&E2:E11&"×"&F2:F11&"×"&G2:G11&"×"&
TRIM(SPLIT(H2:H11, ",")))&"×"&TRANSPOSE(QUERY(FLATTEN(TRIM(SPLIT(I2:I11, ","))),
"where Col1 is not null", )))&"×"&TRANSPOSE(QUERY(FLATTEN(TRIM(SPLIT(J2:J11, ","))),
"where Col1 is not null", ))), "×", 0, 0), "where Col8 is not null", )))