Checkout additional script not working on thank you page

[Himali20]

I added gtag custom event on additional script in checkout section here

https://d.pr/i/oq745a

But it is not working. Though it is loaded on thank you page

https://d.pr/i/cOiMSd

but not getting event tracked. Anyone have idea about this?

[ziadify]

You need to load the main script again on the additional script. should be similar to the following image