There can be multiple reasons why the homepage shows a
404 page. This is usually due to a Magento misconfiguration:
Go to Stores > Configuration > General > Web > Default Pages > CMS Home Page and check if it is set
Go to Content > Pages make sure the column
Store View is not empty for your Home Page CMS page. If it is empty, click on the page, select necessary stores and click save
If you installed ScandiPWA, but the frontend still displays the Luma theme, follow the steps below.
Magento_Theme is not be empty, and contains 2 folders. If this is not the case, compile the theme:
BUILD_MODE=magento yarn build
BUILD_MODE=magento npm run build
After the command's execution, the folders should appear. If there is a compliation issue, please read the logs to found out why.
Check the Content > Design > Themes and make sure your store has the correct ScandiPWA theme set.
If you couldn't resolve your issue, feel free to ask for help! Please see the guidelines for asking for help in Slack.