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They gave at least 4 dates that people interpreted as failure to keep the network's promise. Pioneers were expecting Mainnet in December 2021, but they had an alibi by distinguishing between two mainnet periods: the enclosed and open.

Another three dates were given: 14 March 2022, 28 June 2022, and the most expected date, 31 December last year. The expected open mainnet is based on the maturity of the enclosed mainnet and the progress of KYC, which have not been met.

As far as I know, 31 March this year is the first announcement coming from official channels that the token will be released to the open mainnet.