New contact insertion doesn't work on Google CardDAV

Google CardDAV uses POST instead of currenctly sent PUT to insert a new contact.
The requests results with 400.

debug: PUT https://www.googleapis.com/carddav/v1/principals/my_email@gmail.com/lists/default/2b724bfc-ee0d-4a04-8499-b8446bf831af.vcf
debug: {'User-Agent': 'redacted.apps.googleusercontent.com', 'Content-Type': 'text/vcard', 'If-None-Match': '*'}
debug: b'BEGIN:VCARD\r\nVERSION:3.0\r\nPRODID:-//Sabre//Sabre VObject 4.4.3//EN\r\nUID:2b724bfc-ee0d-4a04-8499-b8446bf831af\r\nFN:test\r\nADR;TYPE=HOME:;;;;;;\r\nEMAIL;TYPE=HOME:\r\nTEL;TYPE=HOME,VOICE:\r\nREV;VALUE=DATE-AND-OR-TIME:20221013T213323Z\r\nEND:VCARD\r\n'
debug: Sending request...
debug: 400
debug: <CIMultiDictProxy('Vary': 'Origin', 'Vary': 'X-Origin', 'Vary': 'Referer', 'Content-Type': 'application/json; charset=UTF-8', 'Content-Encoding': 'gzip', 'Date': 'Thu, 13 Oct 2022 21:41:41 GMT', 'Server': 'ESF', 'Cache-Control': 'private', 'X-XSS-Protection': '0', 'X-Frame-Options': 'SAMEORIGIN', 'X-Content-Type-Options': 'nosniff', 'Alt-Svc': 'h3=":443"; ma=2592000,h3-29=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"', 'Transfer-Encoding': 'chunked')>
debug: <StreamReader 127 bytes eof>
error: Unknown error occurred for google_to_nextcloud/google: 400, message='Bad Request', url=URL('https://www.googleapis.com/carddav/v1/principals/my_email@gmail.com/lists/default/2b724bfc-ee0d-4a04-8499-b8446bf831af.vcf')

https://developers.google.com/people/carddav

Start with the Google CardDAV documentation linked in the issue and trace the contact-insertion request that currently sends PUT to the shown URL. Confirm the required creation method and locate the relevant implementation and regression coverage, since no source file or test is named. Done means Google accepts a new contact without the reported 400 response.