Enfantine Nathan  Suggested by donshottype 

The branding for the allbirds shoe company https://www.allbirds.com/ was done by Red Antler https://www.redantler.com/work/allbirds
No details provided on the design of the logo.
No close match for this these geometric script letters.
Enfantine Nathan is an upright script has some similarity to the allbirds script logo, but the font is by no means a match.
More info:
https://fontsinuse.com/typefaces/40230/enfantine
http://www.jblt.co/v2/en/jbl/page/projects/publishing-architecture/enfantine-nathan

Thanks for giving this insight and providing this many links!