Hello
Thank you for your question and reaching out.
The Import Updates action in WSUS was built using ActiveX, which is now deprecated. This import functionality within WSUS has been replaced with a PowerShell script. The script allows you to import a single update, or multiple updates into WSUS.
Import updates into WSUS using PowerShell : https://learn.microsoft.com/en-us/windows-server/administration/windows-server-update-services/manage/wsus-and-the-catalog-site --If the reply is helpful, please Upvote and Accept as answer--