How do you know what Canon intends for the R3? Rarely do companies specifically identify their competition. However, the evidence of competition is clear. The cameras absolutely are in the same class. Given the similar specs--sports/action cameras with stacked sensors, 30fps burst rates, and blazing fast AF tracking differing significantly only in body style and resolution--the cameras are undoubtedly competitors. Moreover, until Canon releases a model superior to the R3--my money is on late 2022 at the earliest and more likely late 2023 or 2024--the R3 will be Canon's flagship.
And I have no idea how well it measures up to the Sony A1 (and neither do you unless you have early access; in which case, lucky you!). Thus, as stated, there is much I want to know about how well the R3 stacks up to competitors Sony A1 and Nikon Z9.