I've been trying to figure this out for a few months now and have so far been unsuccessful. Depending on where I look, I get different information about this laptop. It obviously doesn't have Thunderbolt, but when you search for the specs, Acer's own website lists this as having Thunderbolt 4 on top of review sites listing the same specs for their reviews of this laptop. Then the laptop manual itself, the specs page linked from the support page, and of course the imprint, or lack thereof, next to the USB-C port doesn't show Thunderbolt at all.
Acer's website showing AN515-57 supporting Thunderbolt 4:
https://www.acer.com/ac/en/US/content/model/NH.QESAA.001 Specs page reached from the support page only showing USB-C:
https://www.acer.com/datasheets/2021/4876/AN515-57/NH.QESAA.001.html Review from ultrabookreview.com showing Thunderbolt 4 in specs:
https://www.ultrabookreview.com/48602-acer-nitro-5-an515-57 Team Acer responding to a question on the Best Buy page for this product 7 months ago stating that this laptop has Thunderbolt 4:
https://www.bestbuy.com/site/questions/acer-nitro-5-gaming-laptop-15-6-fhd-144hz-intel-11th-gen-i7-geforce-rtx-3050ti-16gb-ddr4-512gb-ssd-windows-11/6462658?page=3 User Manual showing that Thunderbolt 4 is only available on AN515-56 & AN517-53:
https://global-download.acer.com/GDFiles/Document/User%20Manual/User%20Manual_Acer_2.0_A_A.pdf?acerid=637662502241034360&Step1=NOTEBOOK&Step2=NITRO&Step3=NITRO%20AN515-57&OS=ALL&LC=en&BC=ACER&SC=PA_6What's the deal? Can we not rely on Acer's own specs pre-purchase and just have to wait until we get a product in hand to see if we won the lottery?