There is no urgency at all for Real Madrid to re-sign Sergio Ramos, his glory days are over and his performance is starting to decline. A club like Real Madrid would prefer players who are younger and whose toughness has been proven in guarding the back line compared to players who are no longer able to produce their best performance. MLS or the Arab League might be more suitable for him to fill the void before he decides to retire, his experience is really needed there to help the development of other players.
If Sergio Ramos returns to Real Madrid, it is certain that he will play a new role there, no longer as a player. Real Madrid is very selective in choosing players, especially those who operate in the defensive area, there are still many other quality and young players who can be brought in rather than having to bring back older players.
Ramos began his career in Seville, and I assume that he will finish it there. After his decision to move to PSG, it seems to me that with this decision he made his return to Real Madrid almost impossible. Yes, he is a very good player, but to end his career as a Real Madrid legend, he needed to remain in the team. With PSG he was unable to achieve anything significant, moreover, he was often plagued by injuries. Now he has returned to Seville and this is quite symbolic, he is playing where he started.