Html – How do I get the value of the aria-label attribute from this WebElement?

Using Java Selenium, I have a reference to a WebElement object that represents the following HTML node:

<td role="gridcell" class="mat-calendar-body-cell ng-star-inserted" style="width: 25%; padding-top: 7.14286%; padding-bottom: 7.14286%;" tabindex="-1" data-mat-row="0" data-mat-col="0" aria-label="2001" aria-selected="false">...</td>

I need the 2001 value of the aria-label attribute, but I can’t seem to able to. The following method invocations all return null and I don’t know why:

• element.getAttribute("aria-label");
• element.getAttribute("ariaLabel");
• element.getDomAttribute("aria-label");
• element.getDomAttribute("ariaLabel");
• element.getDomProperty("aria-label");
• element.getDomProperty("ariaLabel");

The reason for trying both aria-label and ariaLabel is that it’s listed as ariaLabel in the properties list:

I printed out the values of all other attributes of this node to verify that it’s not a timing issue, and, curiously, this was the output:

role: gridcell
class: mat-calendar-body-cell-container ng-star-inserted
style: width: 25%; padding-top: 7.14286%; padding-bottom: 7.14286%;
tabindex: null
data-mat-row: 0
data-mat-col: 0
aria-label: null
aria-selected: null

How can I get the value of aria-label?

Selenium version: 4.15.0

Chromedriver version: 122.0.6261.57