Negative changes but .... happens, even with me

I have already slightly more than 3000TP ticketed for the new period 2025-2026, with BA/AS/AY.
The BA website states:
1.If you’ve already booked a flight beyond 1 April 2025 your Tier Points will be awarded based on a conversion of the existing method. This means any bookings you’ve already made will earn proportionally the same number of Tier Points as today.
2.In some cases, where the fare paid is unavailable or hasn’t been disclosed, you'll earn Tier Points based on a percentage of miles flown. For flights booked before 30 December 2024 for travel from 1 April 2025, that are marketed by British Airways, American Airlines or Iberia, Tier Points will be awarded based on a conversion of the existing method. This means any bookings you’ve already made will earn proportionally the same number of Tier Points, or more, as today.
Do I presume correctly, that existing convertion method applies only for BA/AA/IB flights and no re-qualification due to the AS/AY tickets(BA 1080TP, AS 480TP, AY 1450 TP)?