“indentured Servants” were not slaves. They worked for a number of years, and then they were free. Slaves were.... slaves. Equating the two is nonsense, but that won’t matter to you I think.
Maybe you ought to read up on it some, Both practices were outlawed but the UN in the forties, because the were distinctions without a difference. I imagine that you are a fan of the UN which does equate the two. Not at all nonsense.
Some were, some were not. The City of the Corporation of London has very interesting history courses that explain the whole concept of the indentured servant and what the various classes were. Of course, if you were a Liveryman (meaning your “Guild” or “Livery Company” sponsored you for your Freedom of the City of London that was presented to you by the Lord Chamberlain), you would have been invited to those presentations and would know this.