To add to attah`s answer: Here are some dates and numbers.
| Name | SFOS ready | First released (from wiikipedia) |
|---|---|---|
| Jolla 1 | November, 2013 | - |
| Jolla C | May 2016 | - |
| Xperia X | October 2017 | June 2016 |
| Xperia XA2 | October 2018 | February 2018 |
| Xperia 10 | November 2019 | February 2019 |
| Xperia 10 II | May 2021 | May 2020 |