Code:- 1

[HTTP] HttpTimeout=10
HttpConnectionTimeout=10
HttpReceiveTimeout=10 HttpSendTimeout=10

[Portal.BuildPatch]
ChunkDownloads=3
ChunkRetries=20
RetryTime=0.5


Code:- 2 (just in case the first one doesn't work)

[HTTP] HttpTimeout=10
HttpConnectionTimeout=10
HttpReceiveTimeout=10 HttpSendTimeout=10

[Portal.BuildPatch]
ChunkDownloads=4 
ChunkRetries=20 
RetryTime=0.5

Quick Video Tutorial to Increase Epic Games Launcher Download Speed: