For Google sheets sharing setting, I have it on "Specific people can access", but the people can see who has access to that sheet. Is there anyway to make the setting so that the specific people can't see who else has access to that sheet?
For security reasons Google will always show the people a sheet is shared with.
Your only other alternative would be to set it to public, but that would negate the option of "Specific people can access".
I already mentioned this on a recent question When sharing folders on Google Drive do users know who else the folder is shared with
Users that are explictely included on the sharing settings could see who else has access to the file. To prevent this, create a Google Group, add the collaborators (editors/viewers) to that group then share the folder with the group.
In order to make this work, the group settings should not allow members to see the members list.