Looking for evidence John Biden (b. 1720) is father of Richard Biden (earliest ancestor I've found for President Biden)

Question

I am resuming my research on the earliest known Biden ancestors of President Joe Biden.  I have just connected my wikitree profile for John Biden (born 1720, Hampshire) as uncertain father of Richard Biden (born 1740's, Hampshire), which is "Hypothesis Two" in Richard's profile which I created back in 2021 (https://www.wikitree.com/wiki/Biden-95).  Although uncertain, John is very probably Richard's father, but stronger evidence is needed.

Answer 1

I suppose you've looked in Hampshire and National Archives?

This is for Hampshire:
https://calm.hants.gov.uk/advanced.aspx?src=CalmView.Catalog

https://calm.hants.gov.uk/Overview.aspx?src=CalmView.Catalog&r=((((text)=%27john%20biden%27)))%20And%20((Date=%271700-1800%27))

There are also results in TNA Discovery.
https://discovery.nationalarchives.gov.uk/advanced-search

For example:
John Biden, born in Sidlesham (Sussex), where his family resided by virtue of a certificate from Wymaring, Hampshire; the family returned to Wymaring when he was about 9 or 10.
https://discovery.nationalarchives.gov.uk/details/r/37ff010f-9dbb-416e-96a3-926ec588cad8
 

Comments

It looks like John Biden (born in Sidlesham) hired in 1745 was probably unmarried and less than 25 years old, so not a match to John Biden (b. 1720 Havant) who had a daughter baptized in 1745 at Wymering.  However, seems very likely they were closely related, perhaps even first cousins.  Too bad it doesn't give the father's name for John Biden (born Sidlesham).