[Python] tnmaccess api not returning results

The tnmaccess api is not working for me. No matter what bounding box I use it always returns 0 results. Is it broken, or am I doing something wrong?

import requests
API = "https://tnmaccess.nationalmap.gov/api/v1/products"

def search(dataset, bbox):
params = {
"datasets": dataset,
"bbox": bbox,
"outputFormat": "JSON",
"prodFormats": "GeoTIFF"
}
r = requests.get(API, params=params)
r.raise_for_status()
print(r.content)
print(r.json())
return r.json()["items"]

bbox = "-80.5199, 39.7198, -74.6895, 42.5167" # Pennsylvania

dataset = "Digital Elevation Model (DEM) 1 meter"

dem_products = search(dataset, bbox)


I cannot get the request to return anything through the docs (https://tnmaccess.nationalmap.gov/api/v1/docs) as well. It never accepts my bounding box, saying it is not a number

Output:

{'total': 0, 'items': [], 'errors': [], 'messages': ['The offset is greater than the total number of results for this query. No items returned.'], 'sciencebaseQuery': 'https://www.sciencebase.gov/catalog/items?filter=tagslq%3D%28%28tags.scheme%3A%22The+National+Map+Collection+Thesaurus%22+AND+tags.name%3A%22Digital+Elevation+Model+%28DEM%29+1+meter%22%29+OR+%28tags.scheme%3A%223D+Elevation+Program+%283DEP%29%22+AND+tags.name%3A%22Digital+Elevation+Model+%28DEM%29+1+meter%22%29%29&filter=tagslq%3Dtags.scheme%3A%22The+National+Map+Product+Format+Thesaurus%22+AND+%28tags.name%3A+%22GeoTIFF%22%29&filter=spatialQuery%3D%7B%22wkt%22%3A%22POLYGON%28%28-80.5199++39.7198%2C+-74.6895++39.7198%2C+-74.6895++42.5167%2C-80.5199++42.5167%2C-80.5199++39.7198%29%29%22%2C%22relation%22%3A%22intersects%22%7D&max=50&offset=0&fields=id%2Ctitle%2Csummary%2Cbody%2Ctags%2CwebLinks%2Cdates%2Cspatial%2Cidentifiers&format=json&sort=title&order=asc', 'filteredOut': 0}

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