I am on a tier 2 visa. My BRP was issued on 4 Aug 2017 and it will expire on 1 Aug 2022 but the decision letter was dated on 1 Aug 2017. During my visa application, I was in the UK on a tier 4 visa
Since my BRP shows 3 days less than 5 years, am I eligible to apply for ILR or I should apply for a skill worker visa extension.

May I ask you please help me in this matter.
Thanks