Receiving a pension does not necessarily equate to one being "retired" and no longer working. A pension benefit is just a financial benefit, usually accrued from a lifetime of savings in a private, company, or government pension plan. In the USA, one can receive a pension and continue to work legally. This may not be the case in other countries with socialized retirement schemes.
I have a friend in the USA who collects 3 pensions and is still working at 70 years of age. He collects social security, a union pension, and a company pension.
The LTR presenter definitely stated during the Zoom Conference that one who obtains an LTR Visa under the wealthy retiree path is entitled to a work permit in Thailand. This is of utmost importance to me as the work permit and the paying of taxes provides a path to PR and Citizenship.
Also, the presenter did not restrict the work permit to "digital work permits". She simply said work permit. My assumption is that the work permit is valid for all business endeavors with the exception of protected industries such as "umbrella making" and any profession that does not impact the Thai labor market. I could be wrong on my assumptions as our information on this program is limited.