No, it’s that the cash for more F-was is locked in, at least for around 72, and where any future funding goes - which means Typhoon or Tempest.
Remember that Typhoon was never the desired Tornado F3 replacement, that was a different AST. Typhoon was the Jaguar replacement for the Central Region, a short range dogfighter/day attack mudmover; when they Jag was cancelled the Typhoon contract had already been signed so F3 replacement was cancelled and the Typhoon given the role.
The RAF wanted a long range oceanic twin engined interceptor for Atlantic/GIUK ops - and that is what Tempest is designed for.
So, if a choice has to be made between buying more Typhoon or safeguarding Tempest as it’s replacement - they’ll save the money for Tempest.