Hi @Irina 25
Nice to e-meet you!
Yes, absolutely! You can create your slido session in advance to prepare and test everything beforehand.
The 7-day limit refers to your Slido dates when your participants can join your slido using its unique slido code. So you can take all the time you need to set up and prepare your slido before your 7-day slido dates begin.
The QR code is valid from the date of creation and you can share it with your audience to collect questions, even outside of your set slido dates, as explained over here.
I hope this helps!
All the best,