A cycling site with 275k MAU would be in the very lowest category where compliance is things like 'having a content moderation function to review and assess suspected illegal content'. So having a report button.
Im surprised they don’t already have some form of report/flag button.
They do not have the resources to find out exactly what they need to do so that there is no risk of them being made totally bankrupt.
If that is all - please point to the guidance or law that says just having a report button is sufficient in all cases.