1、Install the MiniMap plugin

https://www.unrealengine.com/marketplace/zh-CN/product/6895988c85964551a4a7dc8a18655642

2、Use plugins

Initialize the map plugin

Add Marker

bind the click event

Features:

Support pure blueprint and C++ calls

Freely add markers

Ultra high performance optimization with almost no efficiency impact

Small map shape (round or square) can be set

Parameter： init( FVector2D ContainerSize, //Small map container size

FVector2D WorldSize, //Landscape size

FVector2D WorldPosition, // Landscape Location Offset in Editor

AActor* Player, // self Player actor

UUserWidget*& Map, // Return value. When initialization is completed, a control will be returned for insertion into the small map container

int Scale, // Small map and world size ratio

float Zoom, // The default scale is a floating point value of 0 - 1.

int UpdateDelay, // Update speed of small map markers, in milliseconds

EMapType MapType // Display mode of small map, rectangle or circle

);

中文说明： https://blog.csdn.net/qq_39447679/article/details/125865075