EU citizen owns a non-EU company – UK resident as self-employed?

I am an EU citizen who landed in the UK on January 2020 (currently OUT of the UK due to the pandemic).

Supposedly, an EU citizen is allowed to stay in the UK for up to 90 days; after that, it’s necessary to “exercise treaty rights” AKA take on an economic activity or be self-sufficient.

My current situation:

  1. Still keep a non-EU company and receive basic salary + dividends (money is sent EVENTUALLY to the UK to cover some minimal costs)
  2. Got an official mail address but no rental agreement (no fixed residence yet)
  3. Got interviewed by the JobCentre Plus and waiting for National Insurance number
  4. Done some job interviews but no success yet
  5. Have an active UK mobile number and three (yes, three!!!) UK bank accounts with a minimum money flow inside the UK
  6. Not yet registered at a General Practitioner (NHS)

Does it all make me a UK resident, regardless of having an inland job or not? Do I exercise my treaty rights by simply registering as a self-employed person and keeping my offshore company (and paying UK income tax, of course)? Otherwise, I am supposedly not allowed to stay in the UK any longer (or reenter the country, for instance).

Sorry to place that question here but I’ve been searching info for months and didn’t get any clear answer; some similar cases are related to people with a British LLC, not a foreign, non-EU company.

Has anyone satisfied the UK fiancee/spouse visa financial requirements by working their foreign job remotely as someone self-employed in the UK?

I’m a UK citizen with a Japanese fiancee. We plan to get married in the UK, so we want to apply for his entry under the fiancee visa. However, we don’t meet the financial requirements yet — I’m searching for, but haven’t yet secured, a UK-based job. That said, I have a Japanese job that meets the income requirement and would be willing for me to work remotely.

I spoke to a Japanese visa firm who suggested it would be possible to count J-income if

  1. I paid tax on the income in the UK.
  2. I became self-employed in the UK and submitted that documentation.

However, it seems like the forms for the self-employed look to a past year of s.e. income, which I don’t have.

Tldr; Has anyone satisfied the UK fiancee/spouse visa financial requirements by working their foreign job remotely as someone self-employed in the UK?