This is the Anker I have. It also does wireless charging, which is very helpful for when my phone thinks it has moisture/foreign material in the charging port.
Anker PowerCore III 10K Wireless Portable Charger https://smile.amazon.com/dp/B0899Z4YPZ
I have this:
https://www.amazon.com/dp/B0899Z4YPZ?psc=1&ref=ppx_yo2ov_dt_b_product_details
Anker PowerCore III 10K Wireless Portable Charger with Qi-Certified 10W Wireless Charging and 18W USB-C Quick Charge for iPhone 13, 12, Mini, Pro, iPad, AirPods, and More
I would rather carry my 10k wireless charging power bank when I need it -- which can also then go into a different pocket or a backpack or something -- than to have anything like this case on a daily basis. It's also cheaper and can be used on my other items as well. Earbuds, Switch, etc.