Nothing is shared with a crew until you share a ticket. Tick a crew on the confirm screen, or open a ticket and use Share with a crew. You can hide a ticket from a crew any time, before, during or after the game.
A shared ticket shows its legs, price, live status and result. Screenshots, your sportsbook, notes, your history and your totals are never shared.
Hide amounts
Hide amounts is on by default, so a crew sees legs, price and result, but not your stake or payout. You can change it in three places, and the most specific one wins: the ticket's Share sheet, then My sharing in that crew, then Settings → Profile.
Share new tickets automatically (in My sharing) only ticks that crew on the confirm screen for you. A ticket you hide is never shared again unless you share it.