iOS Safari Accessibilty VoiceOver issue

We have a button with tabindex=-1 used for announcement once user lands up on the screen.

Currently it is announcing the text within the button in a , but we are unable to suppress the announcement of the button text along with the text, which could be misleading to the end user.

Please assist in providing a solution.

Tried using role="presentation", role="status" attributes but those have not worked.