Why isn't Google Ads tracking working on my client's website?

Tried the usual setup of Google Ads tracking on client website - but doesn’t work.

The thank you page URL is: /28156002364/checkouts/97b2c9da1377d35386fdd572a30a25a0/thank_you, but when checking the event snippet is in the code (not pulling through in Google Ads account), it redirects to /28156002364/orders/2f5ae412b20a12f20ffa34494055f739

any pointers on this, please?

Website is: https://www.gadgetstalls.com/