Solution
Modifying the tables requires you to modify the style sheet you are using. See this
link on how to edit TestStand style sheets. The horizontal.xsl style sheet must be edited for this.
The section in horiztonal.xsl that handles the formatting of the sequence step(s) table in a HTML report is the <xsl:template> element. In TestStand 2021 64 Bit this is located on line 1515. Depending on your version of TestStand, this may be located on a different line.
Inside this element is a <style> element that applies (external link)
CSS styling. Here you can edit the elements to allow the table row to be formatted as you like.