Hi @MohamedMo ,
Please refer the below steps.
1. Read the CSV File(Use you data here)
2. Replace the / with comma
3. Create file by passing the content of step 2 in create file action.
Expressions used for base64ToString and replacing / with , (comma)
//To Read CSV File by Converting it to base64ToString
base64ToString(outputs('Get_file_content-_Read_CSV_File')?['body']?['$content'])
//For Replacing / with , (comma)
replace(outputs('base64ToString'),'/',',')


If this helps , please give this a thumbs up and accept this as a solution.
Thanks,
Sanmesh