AFAIK when you buy bitcoin on blockchain.com it will be freeze on the trading/exchange account for 3 days at least to 7. You can't transfer that amount to your normal wallet yet.
It's 14 days holding period if the OP using ACH upon purchasing Bitcoin on Blockchain.com.
If you recently bought crypto via ACH instant transfer, your purchase may be subject to a holding period of up to 14 days.
And the reason is,
To protect your account and to ensure the integrity of our trading system, we may place a hold on funds leaving the platform. This hold period for funds from ACH transfers is necessary so that funds have time to clear. Rest assured, your funds will be available for withdrawal as soon as the holding period is up!
It's really frustrating to wait a long time like this, that's why for the beginner, this web wallet isn't recommended to them because it made confusions. The reason that can create heavy traffic to their customer support is also has a poor response. I suggest when your Bitcoin arrived, transfer into the non-custodial wallet, for example,
Electrum wallet for safe and convenient to use, which has you have full control of the key. Not a very
buggy web wallet.