Something like this, if using the most common FE map, the AE:
It's the most common FE map yet people have claimed that it's based on a globe projection therefore does not count.
In an attempt to put projections aside:
That map does not corroborate observations that I've made when traveling internationally. The distance between South America and Australia for example does not match shipping times, shipping distances shipping paths, travel times, travel paths, and travel distances.
I agree, it is the most common FE 'map'. And it's not a
claim that it is a globe projection. It simply
is a globe projection. That's how one makes the AE map, by projecting a globe:

And yes, I agree that map does not corroborate observations that I've made when traveling internationally as well.
As for icewall or no icewall, that shouldn't be a gating factor for creating a flat earth map. If such a map can be created someone can put any sort of ice wall want around it if they so desire. The trick is accurately mapping the continents first. Walls and domes can come later.
I think why the AE map is so common is because when it was first proposed not much was known about Antarctica for one. For two, it made it so the sun and moon could orbit above the earth and not drop off the west side of, let's say a Bing map, and magically pac-man and appear over on the east side.
Maybe we start with what ChrisTP showed with that gif morphing a Mercator projection into showing the correct sizes of the continents. Here's a static representation:

If you remove all of the light blue parts and then squeeze together the dark blue parts, like putting a puzzle together. Problems immediately arise in terms the accuracy of distances and you're still in the jam of how the sun moves as well as how my plane gets from San Francisco to Tokyo by going west. But maybe it's a start.