I don't think 'in some extent' is a correct expression. To use the other 'I have always struggled with pronouns, to some extent' It means 'up to a point'. It doesn't really carry a lot of information, maybe it just says 'there's a limit to what I just said'

I have been aware of his conspiracy to some extent , so I have to warn you to keep watch over his indeed in recent days . Take care !!

I agree with Niel... 'in some extent' is not correct to use ever.