In an interview with Varietyco-CEO da Sony Interactive Entertainment, Hideaki Nishino, confirmed that the Development of the PS5 Pro began before the launch of the base version of the console.
Amidst the many rumors before the PS5 Pro was confirmed, many were betting that there would not be a mid-generation console, as the current generation, in the opinion of many gamers, was not fully explored by the base console. However, with this new official positioning from Sony it is clear that the launch of an improved version of the console was already in the plans even before the public reveal of the PS5. According to the executive, the decision to follow this path is related to the results obtained with the PS4 Pro.
In the video below we bring the main points of this interview:
Source: https://www.hardware.com.br/noticias/resultado-obtido-com-o-ps4-pro-fez-com-que-a-sony-apostasse-no-ps5-pro-desenvolvimento-comecou-antes-do-lancamento-do-modelo-base.html