Before the The Timeless Child was introduced in season 12, there was plenty of speculation on how many lives or regeneration’s The Doctor would have.

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Before the The Timeless Child was introduced in season 12, there was plenty of speculation on how many lives or regeneration’s The Doctor would have.
Of course, The Doctor can have as many lives or regenerations as is needed for the TV show to keep going. After all that is why they were created.