Assistive Touch/"Floating Dot"
1. Open Settings
then Accessibility
then Touch
2. Tap "AssistiveTouch" and then toggle it to the on position.

3. Tap "Customize Top Level Menu"

4. Tap the Star and then select "Screenshot"

Screen Recording
1. Open Settings
then control center 
2. Tap Customize Controls

3. Tap the
to add screen sharing

Recommended Controls to Add (using the green +)

Screen Recording (Video Based Instructions)