Notion Share To Web Options

Click "Share"

Click here.

Click here.

To set a link expiry date, select this menu.

You can even choose a specific date for your link to expire on. After this date, the page URL simply won't be public (but you will of course still be able to view it!)

To allow others to duplicate or download a copy of your page to their own Notion account, select 'Allow duplicate as template'. You can also toggle on/off other common access permissions like 'editing' and 'comments'.