Satellite imagery is likely the best way to estimate.
The massive crowds in slow march peaceful protest videos I saw were astonishing.
However if we extrapolate that not everyone who'd support it or are silently supporting it - what % of people available to protest/march were out?
Edit to add: downvoting a question asking for trustworthy, quantifiable sources - you're failing.
Satellite imagery is likely the best way to estimate.
The massive crowds in slow march peaceful protest videos I saw were astonishing.
However if we extrapolate that not everyone who'd support it or are silently supporting it - what % of people available to protest/march were out?
Edit to add: downvoting a question asking for trustworthy, quantifiable sources - you're failing.