They do, taken from the above github page:
"As you may have heard Microsoft Edge no longer uses Chakra. Microsoft will continue to provide security updates for Chakracore 1.11 until 9th March 2021 but do not intend to support it after that."
"As you may have heard Microsoft Edge no longer uses Chakra. Microsoft will continue to provide security updates for Chakracore 1.11 until 9th March 2021 but do not intend to support it after that."