This is getting to be above my level of knowledge and I was hoping for assistance. The script below works with some limits. This script checks to see if a region tab exists, if it doesn't, the regional data from the source worksheet is copied to a new tab by the name of that region. Region is column 24 on the source worksheet, the data starts on row 3 and the header is Row 2.
If the region tab already exists I would like for it to be deleted recreated or repopulated with current data instead of being skipped over.
function createSheets(){
const ss = SpreadsheetApp.getActiveSpreadsheet()
const sourceWS = ss.getSheetByName("Forecast (SQL) Validation")
const regions = sourceWS
.getRange(3,24,sourceWS.getLastRow()-2,1)
.getValues()
.map(rng => rng[0])
const uniqueRegion = [ ...new Set(regions) ]
const currentSheetNames = ss.getSheets().map(s => s.getName())
let ws
uniqueRegion.forEach(region => {
if(!currentSheetNames.includes(region)){
ws = null
ws = ss.insertSheet()
ws.setName(region)
ws.getRange("A2").setFormula(`=FILTER('Forecast (SQL) Validation'!A3:CR,'Forecast (SQL) Validation'!X3:X="${region}")`)
sourceWS.getRange("A2:CR2").copyTo(ws.getRange("A1:CR1"))
}//If regions doesn't exist
})//forEach loop through the list of region
} //close createsheets functions
function createSheets() {
const ss = SpreadsheetApp.getActive()
const ssh = ss.getSheetByName("Forecast (SQL) Validation");
const regions = ssh.getRange(3, 24, ssh.getLastRow() - 2, 1).getValues().flat();
const urA = [...new Set(regions)];
const shnames = ss.getSheets().map(s => s.getName())
let ws;
urA.forEach(region => {
let idx = shnames.indexOf(region);
if (~idx) {
ss.deleteSheet(ss.getSheetByName(shnames(idx)));//if it does exist delete it and create a new one
}//if it does not exist the just create a new one
ws = null;
ws = ss.insertSheet(region);
ws.getRange("A2").setFormula(`=FILTER('Forecast (SQL) Validation'!A3:CR,'Forecast (SQL) Validation'!X3:X="${region}")`)
ssh.getRange("A2:CR2").copyTo(ws.getRange("A1:CR1"))
})
}
Loop through all tabs, and if the tab already exists, delete it via deleteSheet before creating it again, as you are doing with the non-existent ones..