Can I change what time of day Autoinvest buys shares for me?
Once an automation has been triggered, the whole Automate cash balance will be invested on the next trading day (before midday) according to your chosen investment strategy.
If you want your Automate setup to trigger at a different time, you can adjust the Autoinvest execution time here.

To access this option, you might need to activate Advanced Features first from here.

For more information on how Automate works please check out this help article.