SBD can be changed for Steem on the market (see your wallet). The price you like to have for it depends on you. You can sell immediately or ask a higher value than the lowest bid.
Your wallet
Steem Dollar
Market
Fill out the amount od Steem Dollar you like to change at 'Total'.
As you can see 3 SBD is over 34 Steem at the moment (November 3, 2021, 2.30 p.m. Parish time)
Instead of 0.086049 you can fill out 0.1 too and wait. Well, you know how it works.
As long as you don't click 'buy Steem' you can check it out.