You are reading your link wrong. They are deprecating 2.5-preview models. 2.5 (including lite) are up till at least sept/oct 26.
(Another commenter pointed out that this is the earliest shutdown date and it won't necessarily be shut down on that date).
Where are you getting sept/Oct from? I see gemini-2.5-flash-image in October, but everything else looks like June/July to me?