[Q] UDP traffic

Hey there community, i hope you're having a great day...

I'm looking for some help advices regarding UDP traffic on android device ( for my case it's Xperia z1 c6903 ) running 5.1.1 firmware.
I spent a lot of time in google'ing and researching, but still cant get fundamental understanding...and i hope i'll find it in this topic.

So my goal is to secure ALL traffic which is outgoing from device. As i know there are 2 kind of traffic --> TCP and UDP.

I'm using Proxy software on my PC ( under Windows 10 ), which is connected to the same WiFi as android device.
So to secure TCP traffic, i use IPTABLES ( on android ), and just forward ports 80 and 443 to PC_local_IP . This method works for me as intended, but ( as i know ) it DIDNT WORK for UDP traffic.

All i understand about UDP traffic, that DNS is the part of it and working on 53 port...i didnt find any other practice examples of UDP traffic on android, so my questions are:

1. What are the examples of UDP traffic on android device, what % of all traffic goes to UDP ?

2. Is it possible to forward ALL UDP traffic, like i forwarded the TCP one ?

3. Is it possible to check if i'm missing ( leaking ) UDP traffic ? ---> any application or even website, which can check if UDP traffic is secured


Hope for your help, community

Cheers ;)

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