Do you offer a reward if the password is discovered?
Contact me by private message to see this together. There is always a chance to find a lost password.
You can also share the file here publicly, anyone could help, but there is no guarantee and funds can be stolen.
Finally got in to crypto and (stupidly) invested most of my money into litecoin and a little in bitcoin. I moved my coins to the litecoin qt wallet and for the passphrase I typed it into a word doc (saved on a cold USB) and copied it when entering the passphrase. I did this to avoid mistyping the passphrase given it’s 10 words long.