I want to point that python standard library also has tool for processing XML, namely xml.etree.ElementTree you might use it for this as follows
import xml.etree.ElementTree as ET
import requests
root = ET.fromstring(requests.get("https://g1.globo.com/rss/g1/").text)
for pubDate in root.findall("*/item/pubDate"):
print(pubDate.text)
output
Mon, 07 Mar 2022 15:28:38 -0000
Mon, 07 Mar 2022 15:27:46 -0000
Mon, 07 Mar 2022 15:27:17 -0000
Mon, 07 Mar 2022 15:26:41 -0000
Mon, 07 Mar 2022 15:24:59 -0000
Mon, 07 Mar 2022 15:24:36 -0000
Mon, 07 Mar 2022 15:24:22 -0000
Mon, 07 Mar 2022 15:23:53 -0000
Mon, 07 Mar 2022 15:23:28 -0000
Mon, 07 Mar 2022 15:22:35 -0000
Mon, 07 Mar 2022 15:22:34 -0000
Mon, 07 Mar 2022 15:20:14 -0000
Mon, 07 Mar 2022 15:17:29 -0000
Mon, 07 Mar 2022 15:16:49 -0000
Mon, 07 Mar 2022 15:16:30 -0000
Mon, 07 Mar 2022 15:15:49 -0000
Mon, 07 Mar 2022 15:15:16 -0000
Mon, 07 Mar 2022 15:12:35 -0000
Mon, 07 Mar 2022 15:12:27 -0000
Mon, 07 Mar 2022 15:10:54 -0000
Mon, 07 Mar 2022 15:10:41 -0000
Mon, 07 Mar 2022 15:10:37 -0000
Mon, 07 Mar 2022 15:09:12 -0000
Mon, 07 Mar 2022 15:08:45 -0000
Mon, 07 Mar 2022 15:07:46 -0000
Mon, 07 Mar 2022 15:05:42 -0000
Mon, 07 Mar 2022 15:04:53 -0000
Mon, 07 Mar 2022 15:04:41 -0000
Mon, 07 Mar 2022 15:03:38 -0000
Mon, 07 Mar 2022 15:03:15 -0000
Mon, 07 Mar 2022 15:01:14 -0000
Mon, 07 Mar 2022 15:00:37 -0000
Mon, 07 Mar 2022 15:00:26 -0000
Mon, 07 Mar 2022 15:00:09 -0000
Mon, 07 Mar 2022 15:00:04 -0000
Mon, 07 Mar 2022 14:59:32 -0000
Mon, 07 Mar 2022 14:58:46 -0000
Mon, 07 Mar 2022 14:58:04 -0000
Mon, 07 Mar 2022 14:58:02 -0000
Mon, 07 Mar 2022 14:55:24 -0000
*/item/pubDate is path describing elements you want to access