Hey,
There are multiple ways :
Since the column is in DB, you can use Replace SQL function while querying the data as well.
or
you can use Replace function in dataflows or normal expressions:
https://learn.microsoft.com/en-us/azure/data-factory/control-flow-expression-language-functions#replace
https://learn.microsoft.com/en-us/azure/data-factory/data-flow-expression-functions