It becomes irrelevant when my 10 year route started coz I switched to 5 year route.

Hello,
Can someone please clarify when is the earliest I could apply ILR. I was on 10 years family route. Switched to 5 years spouse visa valid from 19/10/2017 to 17/05/2020. Got extension from 07/10/2020 till 26/04/2023. Do I have to wait till 04/2023 or can I apply earlier. Thank you