with Sovereign? maybe nostr:nprofile1qqsxkxud4s60l3sagexlamcquj5y5czwzuh0vwglkc5jj0t0zenpfrqprfmhxue69uhhyetvv9ujuum0wejhyetfvahzuctswqhs9mnsng can assist you, he is the Sovereign Dev and CEO

I have lost thousands of sats on all cashu wallets, all of them have risk, but more often than not what I thought lost was not lost, it could be recovered in one way or another

I just tested again the minting.

For the sake of helping, in case you missed a step

1. click on receive
2. Click on Mint Token
3. Select the amount and mint
4. copy the Lighting Network invoice (you are funding the wallet)
5. open the LN⚡ wallet you will be using to send the funds, I just used Minibits to pay a invoice I created
6. pay the invoice
7 open Sovereign app again, the funds should be there or shortly

By experience, if you used Wallet of Satoshi or any other wallet like Phoenix the funds may be on flight , last time it happened to me I was funding minibits, took 8 hours, I thought I lost the sats but they arrived.

Hope this helps