This is a bit misleading. RTD confirmed that Disney ordered 26 episodes, however this doesn't include season 16(or 3). The 26 episodes included 3 60th anniversary specials and a Christmas special in 2023, 8 regular season episodes and a Christmas special in 2024, 8 regular season episodes in 2025 and a 5 episode spin off (The War Between the Land and the Sea) in 2025 or 2026. Season 16 (3) was never going to be negotiated with Disney until after season 15 (2) transmits this year. Multiple sources have also confirmed that even if Disney doesn't commission another set of seasons does not mean that the BBC will cancel its flagship show. Don't forget that the Doctor Who franchise has survived without Disney for 60 years.