https://eu.community.samsung.com/t5/galaxy-a-series/a06-didn-t-receive-one-ui-7/td-p/12699540Check for updates manually: Go to Settings > Software update > Download and install.
Ensure a stable Wi-Fi connection: Updates are often large, and a Wi-Fi connection is usually required.
Consider using Samsung Smart Switch: If available, Smart Switch on a PC can help install the update.
If still not available, be patient: Updates are often rolled out in stages, so it might just take some time to reach your device.