Cohabitation evidence

Hi there,
I wondered if anyone in the group has had experience submitting a (unmarried) partner visa application where there is limited official evidence of cohabitating for 2 years?
For 1-2 months of this period, we were “locking down” together but not officially residing. Could provide proof of Amazon deliveries, many many photos, receipts from local stores, Monzo shared account, convo screenshots (e.g. pick up milk please)… is this sufficient or does it need to be official tenancy agreement, bills etc?
Thanks in advance

How long have you really been living together?

The two years evidence of 'living together in a relationship akin to marriage' with shared financial responsibilities is mandatory. There is no leeway or loophole or discretion by UKVI for this requirement as an unmarried partner.

At the time of application, we would have been living together 1 year + 10 months 'officially'. I.e. signed a lease together and moved in. Two months prior to that, we were locking down together so living together but not with bank statements, lease, etc.

What is each of your immigration status/history in the UK?

I am Australian, currently on Tier 2 visa (due to expire when we will be lodging Partner Visa).
Partner is UK Citizen.