If you want to test the whole cross-client cashu wallet experience there a a few. What OS are you on?
Discussion
Android, would to check that out
Cool, you can get Olas from the Zapstore, then create a wallet there. Then go to Satshoot.com (sing in with Amber) and you should see the wallet there too. You can change the name and go back to Olas, the name change should show. It's a bit buggy, and probably breaks every few days, but when I put balance in on Satshoot it showed on Olas.