Missable Content

Hello simmers!

First of all sorry for my probably bad english because is not my first language, but I will try!

I have played the sims 4 for a long time (since its launch) but due to things in life I lost my saved game in which I had practically everything including special objects from the events that have been appearing in the game, the thing is that now I have the desire to play and start again and I was wondering if it is possible to get all these special event objects in the game in some way, to have them unlocked again in my game, so the question is... are there objects that are impossible to get?

Thank you all for the help! See you in the Sim World!