To add a little info. Many finders also have an Amplitude Scope view that you can turn on to accompany your traditional sonar view. To the right of the screen, you’ll see that roughly 1“ area and it shows you in “real time” much like a flasher.
The finder I have as well as many others also have the flasher screen. Notice how the flasher screen also has the Amplitude Scope to the right as well.
And just for clarification. Many units, like the Striker have GPS. GPS is not to be confused with mapping as mapping includes actual maps. GPS units, will just show a point on a screen although I believe the Striker series you can create your own maps by cruising around your body of water.