Ronaldo having two and half years contract which is going to end in 2025 then most chances at the age of 40 he will retire from soccer but still stay in soccer because now he is brand ambassador of the Saudi League and Al Nassr soccer club, and they want him to stay until 2030 which is long time hopefully things will be good for them during this time.
I do not think Ronaldo will stop playing at the end of his contract. He likes this game very well and with the way he plays, it is obvious that he still wishes that he was young. Ronaldo will not retire at 40, he would like to play for as long as his body can permit. So, what I feel is that he will have a contract renewal at the end of this one, and it may be even better because of what has been offered to other European players that have moved to Saudi Arabia's league. Al Nassr will try to beat it, to keep him happy.