Starting to rollout (so your tenant might not have this yet but it will soon) is the ability to export a Project for the web project to Excel. This is the feature detailed here on the roadmap: https://www.microsoft.com/en-us/microsoft-365/roadmap?featureid=67149. Once this reaches your tenant you will see a new ellipsis action button on the top right corner of the page as outlined below in red:
Clicking the ellipsis loads the action menu:
On this menu, notice the Copy project action has been moved here but also notice the Export to Excel option. Clicking the Export to Excel option will first show a toast message to let you know the export has started and another to say it is completed:
The Excel file can then be opened, see below for an example containing the project data as seen below:
The export includes all columns added to the view, both out of the box columns and custom columns plus all default columns not added to the view including Notes.
Look out for this feature soon if it hasn’t hit your tenant yet.