This is an interesting read to see how far back older models may get Android 10 because for me its an indicator of how long I may be able to sweat a new phone (that and whether LineageOS has support for it). Some like Samsung will take ages which is why I stopped buying Samsung at S5.
See #^https://www.digitaltrends.com/mobile/android-10-when-do-you-get-it/
#^https://www.digitaltrends.com/mobile/android-10-when-do-you-get-it/