Install and open the CPU-Z app. This app makes this task easier.
You can see the SOC tab by default. At the top, you can see your device's chipset.
If it is a MediaTek device, you'll see the MediaTek at the top. Check it out the below screenshot of the MediaTek device:
Alternatively, you can find out this information using Mobileuncle Tools app. If you are a Mobileuncle Tools user, then here are the steps for you.