Summarize:

Tap the Chrome app icon, which resembles a red, yellow, green, and blue sphere. As with desktop browsers, refreshing on mobile will only affect the page you're currently viewing. This option is in the top-right corner of the screen. Tapping it prompts a drop-down menu. It's at the top of the drop-down menu. Doing so will cause your current page to refresh. By dragging the page down until you see the "Refresh" arrow appear at the top of the screen, you can prompt the current page to refresh.
Open  Google Chrome. Go to the page you want to refresh. Tap ⋮. Tap the "Refresh"  icon. Refresh by swiping down.