https://pine64.com/product/pinecil-smart-mini-portable-soldering-iron/

review:

https://www.tomshardware.com/reviews/pinecil-v2

(I haven't used this product)

this is portable in the sense that it is small and lightweight. it is not cordless from what I understand. You would need to combine it with some type of power source such as a portable battery pack, as long as its capable of outputting the amount of power this soldering iron will draw

example: https://www.amazon.com/Techsmarter-20000mAh-Delivery-Portable-Compatible/dp/B07N6GKSG1/ref=sr_1_4?crid=3ARFSRC63LRMO&keywords=usb+pd+power+bank+45w&qid=1669745870&sprefix=usb+pd+power+bank%2Caps%2C77&sr=8-4

the silicon usb-c cable sold on pinecils website will be more heat resistant than a standard usb-c cable so if it accidentally touches the iron it won't melt immediately.

another benefit is it uses ts100 tips which are common and cheap