I have copied and pasted the file from

vendor/magento/module-checkout/view/frontend/templates/success.phtml

to

app/design/frontend/THEME/THEMENAME/Magento_Checkout/templates/success.phtml

Modified some codes in that file, then after I have

• cleared the cache
• removed file manually from var/view_preprocessed and pub/static

But my code won't is displayed in the frontend.

Searched already via find command for another success.phtml file but nothing found.

Any ideas to override the success.phtml page?