Linden Lab has confirmed that SL Mobile is being developed and that the initial release is planned for late 2023 with limited functionality to start of with with more functionality being added after.
Apparently the core development of this product started in October 2022 built upon Unity. SL Mobile will be compatible with iOS and Android devices. The lab have been working on the graphics, avatar rendering, rendering edges and more.
Second Life Mobile – First Look Preview
Sounds very exciting and I would love to try out SL Mobile when it’s in beta later this year. Hopefully the lab will update the Second Life community on a regular basis on the progress.