Recover messages on Snapchat

Hello,

A few weeks ago, I uninstalled the Snapchat app from my phone (an iPhone, just in case that detail matters). I did it to cut myself off from social media and without any fear since the app is just uninstalled, which is supposed to not affect my data in any way. However, when I reinstalled it last night, I noticed that I was missing a chat thread (which I seem unable to recover, but I'm posting my problem here, you never know). This particular thread is from someone who blocked me last year, but I consider our exchanges valuable. Until the uninstallation of the app, the thread was still there, even when my phone ran out of memory and it had to, by itself, uninstall the app (the famous little cloud asking to reinstall it). My question is therefore the following: despite my desperate attempts to delete and reinstall the app and to request data (which, unsurprisingly, shows me all the chats in the world except this one), is it possible for me to recover my chat thread with this person? (Knowing that normally, the deletion of messages concerns only the blocker and not the blocked)

Thank you in advance,
Best regards