A huge majority of the list on this post are already things the Monzo app supports, do you not have an account yet? I recommend searching this forum as someone has likely already suggested a lot of what you’ve recommended in this post.
The former is not currently supported, but there is a thread for that here. The latter is possible already within the app.
This already possible for some products such as energy supply and insurance and Monzo are working on expanding this further.
Monzo already offer loans.
Monzo is working on a Metal card for Monzo Plus users. There’s a thread for that here.
This is possible as Monzo offer a UK Current Account
Monzo already support 3D Secure for online payments, the Monzo app can already be setup to require a fingerprint or Face ID to unlock the app.
Freezing and managing your card can already be done in the app.
This already exists, there’s a ‘Help’ section within the app.
Monzo already provide this.
Most of this is already possible within the app, and you already suggested supporting Paym payments above.
Monzo already support Faster Payments.
This is possible within the app already.
This was a thing up until last week, whenMonzo paused it due to the current number of sign-ups.
How is this different from #20?
Monzo do provide full statements available in app, but 5-6 years of statements aren’t possible providing unless can time travel 
(Monzo hasn’t been around for 5-6 years).
This is already possible in app.
Monzo already support overdrafts.
Monzo is already trialing this feature in Monzo Labs, however not all banks are supported currently.