Thunderbird for Android Community Forum

Hello on my Samsung S24 synchronisation of email became very slow for a few days. I trier to réinstall TB but it did'nt change anything. Do you please have any idea where could be the bug and the way to fix it ?

I'm using Thundebrird version 17.0 on Android 15. I sent last month an email (from Thundebrird Desktop) to multiple people and got from around 20 of them responses which I critically need to preserve. I deleted none of them (intentionally). Today I found out that 15 of them disappeared from my inbox, when checking on Thunderbird on my laptop. On my phone I can find those 15 in my trash folder grouped together. I was super relieved to find these critical responses but also confused since I definitely didn't delete 15 of those emails. Most likely they were grouped together and I swipe delete them by accident. I mark each of them and select "move to" -> "Inbox". And now they just vanished. They are no longer in my trash and don't show up in my inbox. Normally when I move from deleted to inbox they move fine, same for spam.

Anything I could do? Anywhere I could look for these emails?

I have just reinstalled T/B (3-4 times now). Scanned barcode from notebook. Installed ok. This mobile T/B DOES NOT give me any option to add folders. Only: inbox, outbox, drafts, sent, deleted. I at least want (1) extra folder to store messages. How do I achieve this? Thanks My laptop T/B works well (on Ubuntu)