I hope I can get a few queries answered and thank you in advance if you can help.

Below are the dates my visas were granted.
22 March to 2021
LTR - Appendix FM
D- LTRPT1.1, meeting requirements a, b & c
20 March 2018
LTR - Appendix FM
D- LTRPT1.1, meeting requirements a, b & c
9 Apr 2015
LOTR - Article 8
I very stupidly put the wrong application in and got this message:
On 23 July 2023 you applied for permission to stay on the basis of your Private Life. However, it is noted that you fail to meet the validity requirements as you have never held leave to remain in the UK on the basis of your Private Life.
Please consider whether you wish to proceed with your current application or whether you would like to vary this application. You may want to seek independent immigration advice.
If you do decide to vary your application, you will need to pay a fee for the new application and you will then receive a refund of the fee for your application on the basis of your Private Life.
We will hold your current application for indefinite leave to remain on the basis of your Private Life for 14 days from the date of this notice.
If you would like to vary this application, you should submit a new application and we will treat that as a variation and decide that application instead of your application for indefinite leave to remain on the basis of your Private Life.
If we have not received a new application from you by 13 December 2023, your application for indefinite leave to remain on the basis of your Private Life will be rejected.
Questions: Will I need to re-do my biometrics?
He can I submit more documents (employment verification)? I still have access to my UKVCAS account but don’t know if the newly uploaded documents will be sent if I don’t do another biometrics.
Is Set M the correct application (5 year parent route)?
Thank you all.