Peak Design did indeed apply for "everyday sling" trademark in standard characters on Jan. 26, 2021.

I find it interesting that the filing basis for the application is 1(b) (intent to use, i.e. I don't use it now but plan to use it in the future) and not 1(a) (actual use in commerce as of application date). There is also no specimen on file to show Peak Design's use of the mark, consistent with the 1(b) basis.

A quick search found that Peak Design has been marketing "everyday sling" since quite a few years ago. I don't know Trademark law enough to understand why they only applied for a trademark this year and under 1(b) basis. It could be intentional.

Still, another quick search found that Amazon has sold "everyday sling" in 2005. That could be used by a trademark examiner in rejecting Peak Design's application, for example as evidence that the term is descriptive or even generic.