Re: 1-16-19 is last time my Note 9 received any update
download and run Samsung smart Switch. If that won't do it look up your local UBREAKIFIX and seeing by there. No charge and they'll flash it with the latest version. Or read up on ODIN and flash it yourself. My last OTA update was back in February. nothing since then. I've done the UBREAKIFIX route once and ODIN 4 times just to stay up to date.