Several solutions available.
1. Open the "Help" menu and then click on "Activate Purchased Content", or "Activate Entire Library". Depending on the amount of content to be checked this could take some time.
2. Using the Smart Gallery select "Sync Local Content"
3. Redownload and install the items in question from your account or Marketplace inventory.
System: Win 10 Pro (20H2), Asus X99-E WS, CPU i7-5930K -3,5 GHz, 32 GB DDR4 2666-16 RAM, NVidia GTX 1080 Ti GPU - 11 GB VRAM(Driver Studio-452.06), Samsung 850 Pro 512 GB SSD, 6 TB HD storage.