How can I edit product page layout Magento 2.2.3.

[5cae2414c6257]

Hello, my product page view has been broken I don't know how can I modify the page product layout.

 I have two website with sirena theme, but one of them is ok. I attach picture (URL of the picture. https://i.ibb.co/mJzNr9Z/Captura-de-pantalla-2020-03-23-a-las-18-17-48.png I don't know why the picture doen't show on the post, sorry).

 I tried to copy and paste the catalog_product_view.xml file in /app/design/frontend/Mypackage/mytheme/Magento_Catalog/layout/  and vendor/magento/module-catalog/view/frontend/layout/  from the web that works correctly to the one that doesn't work.

How could I fix it?

Thank you very much

[Sanjay Jethva]

Hello @5cae2414c6257 

You can manage layout using storewise in product edit.
Also, change the layout from store configuration using the storewise setting.

I hope it helps.

[5cae2414c6257]

Hello Sanjay, thank you for your reply. I have tried your idea but doesn't work. The point is that the file product page is wrong.

How can I find the file product page on Magento 2 for try to fix it? what folders or folders is it in?