The cited source states that 2026 was a date set when he was a candidate.

The current covid relief plan proposes that the minimum wage be raised to $15 immediately.

Furthermore, he is issuing executive orders to increase the minimum wage to $15 within 100 days to all federal workers AND their contractors (I am assuming this is for new contracts, though).

In other words, if you do business with the federal government, you must pay a minimum wage of at least $15. This will have a significant impact on the wages in general, even if Republicans block the $15 proposal in the relief package.

This mandate by executive order will be indexed to inflation:

https://www.motherjones.com/politics/2021/01/biden-minimum-wage/

I'm beginning to think Biden #metooed your grandmother or something. The anti-Biden stuff is out of hand, and in this case, not factual.