I found this in FAQ: ALX token totals displayed in the app during the beta test have exactly the same value as real ALX tokens, but have not been delivered to your wallet. When ALX moves from the testnet to mainnet, your ALX tokens will be delivered to your in-app wallet.
after the testnet, no specific date seen, meaby check whitepaper :
https://algebraix.io/whitepapers/
I found this in FAQ: ALX token totals displayed in the app during the beta test have exactly the same value as real ALX tokens, but have not been delivered to your wallet. When ALX moves from the testnet to mainnet, your ALX tokens will be delivered to your in-app wallet.