Hi Ash,
The WordPress table block isn’t capable of adding lists. One way to approach this is the use a GB Grid Block in conjunction with Headline Blocks.
Reference: https://docs.generateblocks.com/article/grid-overview/
You can add Border size values to the Container Blocks of the Grid Blocks to add the lines/dividers.
Then, you can add Headline Blocks, with icons similar to list icons. Reference: https://docs.generateblocks.com/article/headline-overview/#icon
We can add this through code as well.
Otherwise, you would need a third-party plugin. Here’s an article I found which may be helpful: https://www.wpbeginner.com/plugins/best-wordpress-table-plugins/