Emails going unread into trash that I do not want to go there

Maybe those messages were mistakenly identified as spam by Thunderbird whilst there is a user setting to move new spam messages directly to the Trash folder...?

Is there a way to right-click and moved to the inbox? Or mark has not spam?

If an unread message in the Trash folder is mistakenly marked by the "orange arrow symbol" as Spam you should R-click on it and select > Mark > As Not Spam. Normally thereafter this message will be automatically moved to the Inbox folder. If not, you can move it manually to Inbox.

I have this problem also. Even after moving the message back to the inbox it will pop back into the trash folder. It is definitely something with thunderbird because if I close thunderbird and log into the accounts webmail access, I can move the message to the inbox and it will stay there. upon reopening thunderbird, poof, back in trash.