If you want to search for alternatives, it's a faux-shearling or "sherpa"-lined parka. Many of the cheap ones are only lined in the hood or on the collar, though, which... sucks. True shearling is a leather product, it'll probably cost more than this secondhand, so don't worry about that.
Oh, and if you're more into the style of the parka shell and don't care as much about shearling... IDK, the north face, alpha industries, uniqlo, abercrombie.
Don’t know the exact model but the brand looks to be Kuhl.
The brand is Kühl. This is the closest I could find currently available on their site: https://www.kuhl.com/kuhl/mens/outerwear/ms-arktik-jacket/?color=DARK%2520KHAKI
Thanks! Way over my budget though.
If you want to search for alternatives, it's a faux-shearling or "sherpa"-lined parka. Many of the cheap ones are only lined in the hood or on the collar, though, which... sucks. True shearling is a leather product, it'll probably cost more than this secondhand, so don't worry about that.
Carhartt on Amazon: https://www.amazon.com/Carhartt-Relaxed-Washed-Sherpa-Lined-Jacket/dp/B08BG7YZ86/ref=sr15?keywords=sherpa+lined+coat+mens&qid=1697033643&sr=8-5
Levi's does sherpa-lined trucker jackets for relatively cheap: https://www.nordstrom.com/s/levis-high-pile-fleece-trim-trucker-jacket/6473661?origin=keywordsearch-personalizedsort&breadcrumb=Home%2FAll%20Results&color=200, https://www.nordstrom.com/s/levis-fleece-denim-trucker-jacket/5685556?origin=keywordsearch-personalizedsort&breadcrumb=Home%2FAll%20Results&color=421
field jacket from Levi's: https://www.nordstrom.com/s/levis-corduroy-high-pile-fleece-collar-field-coat/6458314?origin=keywordsearch-personalizedsort&breadcrumb=Home%2FAll%20Results&color=255
shirt jacket from Urban Outfitters: https://www.urbanoutfitters.com/shop/vintage-sherpa-lined-plaid-shirt-jacket?category=SEARCHRESULTS&color=040&searchparams=department%3DMen%26q%3Dsherpa&type=REGULAR&size=L&quantity=1
Oh, and if you're more into the style of the parka shell and don't care as much about shearling... IDK, the north face, alpha industries, uniqlo, abercrombie.