The submit block is a variation of the Button block (link below).
Align the text content: left, center or right.
Select the maximum width of the block.
Define the distance to the top, right, bottom and left of this block
Determine how the label text and icon are aligned within the button.
If you toggle the shrink option at the bottom of the edit menu, you can then choose how you would like it to be aligned within the screen.
Change the color of the button. You can edit the colors in the design tab.
Choose from button style options such as ghost (text & icon only), outline, or fill.
Change the size of the container, text, and icon simultaneously.
By clicking on the default arrow icon in the edit menu, choose from streamline's thousands of icons, and you'll be sure to find one that fits just right.
Flip the order of the text and icon within the button
Shrink the container to only the size of the text and icon.
Without a submit action in your flow you won't be able to collect any information. You should also be aware that the use of more than just one submit actions in your flow may lead to inconsistent and distorted data.