The comment you replied to was correct, as M1 was expanded to include savings deposits.
Here's a link to a Q&A about the change, and the relevant explanation.
"3. Why are savings deposits being recognized on the H.6 statistical release as a transaction account?
Posted: 12/17/2020
A. As announced on March 15, 2020, the Board of Governors reduced reserve requirement ratios on net transaction accounts to 0 percent, effective March 26, 2020. This action eliminated reserve requirements for all depository institutions and rendered the regulatory distinction between reservable “transaction accounts” and nonreservable “savings deposits” unnecessary. On April 24, 2020, the Board removed this regulatory distinction by deleting the six-per-month transfer limit on savings deposits in Regulation D. This action resulted in savings deposits having the same liquidity characteristics as the transaction accounts currently reported as “Other checkable deposits” on the H.6 statistical release.
To account for the change in their liquidity characteristics, savings deposits will be recognized as a type of transaction account on the H.6 statistical release"