Are all robo-advisors really passive? What are some of the definitions of passive investing? What is your definition? Seems like some are pseudo-passive, what are your thoughts?

In my opinion, if you're making active shifts in your portfolio allocation in response to any market activity or sentiment, you can't be called passive investing. Other than rebalancing to stick to the original asset allocation decided, every other portfolio decision is an active one.

And that's ok. As long as you accept it.

The only way to be as passive as possible is to buy and hold and do nothing till your goals are met.

You can passively invest into active investment tools like Active ETFs or Mutual Funds like EndowUs or actively invest in passive tools like Stashaway or Syfe.

As long as you're investing regularly, and staying invested, while monitoring costs, that's fine.