Use the standard Insider update checks first, because build 26220.9022 is the current Beta build and updating to the latest build refreshes the expiration.
- In Settings > Windows Update > Windows Insider Program, confirm the device is still enrolled and the selected channel is Beta.
- In Settings > System > Activation, confirm Windows is activated.
- In Settings > Windows Update, select Check for updates again and leave the device powered on and signed in outside active hours so installation can complete.
- In Settings > Windows Update > Windows Insider Program, if prompted, enable diagnostic data by opening Diagnostics & feedback and turning Send optional diagnostic data to On.
- Check whether the device is already on the latest build for the Beta channel by comparing against Flight Hub.
- Check recent Insider flight posts for known issues that might block the update.
If the device still does not receive or install the update, the documented next step is a clean install using a Windows Insider Preview ISO. A clean install resets the device, so back up files first.
If the build is nearing expiration, go to Settings > Windows Update and select Check for Updates. If no update appears, settings may need adjustment or a clean install may be required.
A Microsoft Q&A answer for this exact expiration scenario states that the latest Beta build with the new expiration date is 26220.9022.