Besides the Ugreen 20W USB-C PD Charger and Apple 20W USB-C Power Adapter, another 20W charger you can consider is the Baseus 20W USB-C PD Charger.
It is the cheapest of them all, retailing at S$10.99 on Lazada with free shipping to Singapore.

Besides the Ugreen 20W USB-C PD Charger and Apple 20W USB-C Power Adapter, another 20W charger you can consider is the Baseus 20W USB-C PD Charger.
It is the cheapest of them all, retailing at S$10.99 on Lazada with free shipping to Singapore.
I have been waiting for the Ugreen 65W GaN Dual USB-C Charger for a few months now. It has been going in and out of stock pretty quickly.
Ugreen 65W GaN Dual USB-C Charger retails for S$34.19 on Lazada. Shipping to Singapore is S$1.49.
Ugreen 20W USB-C PD Charger is an alternative to the Apple 20W USB-C Power Adapter. It retails for S$15.99 on Lazada and shipping to Singapore is S$1.49 if you have not collected the free shipping voucher from Lazada.
This is a Power Delivery 3 (PD 3) / QuickCharge (QC 4) charger, and hence it can deliver 9V/2.22A as required by Apple’s MagSafe Charger.
Apple 20W USB-C Power Adapter retails for S$29 or S$25.68 if your company is on Apple’s Employee Purchase Plan (EPP).
Like most Apple products being sold, it doesn’t come with anything extra. So no USB-C to Lighting cable or USB-C to USB-C Cable is included in the packaging.
MagSafe Charger retails for S$59 or S$53.50 if your company is on Apple’s Employee Purchase Plan (EPP).
MagSafe is a not new invention, Apple has been using MagSafe Power Adapters since 2006 for their MacBooks.
Another companion product to the Satechi USB-C Apple Watch Magnetic Charging Dock is the Satechi USB-C Apple AirPods Wireless Charging Dock.
You can use this charger to charge your AirPods, AirPods (2019), and AirPods Pro.
Satechi USB-C Apple Watch Magnetic Charging Dock retails for S$51.99 on Amazon.sg.
Satechi USB-C Magnetic Apple Watch Charging Dock is a one-piece USB-C Apple Watch charger that doesn’t come with any dangling cable. It plugs straight to the USB-C port of your MacBook or your iPad Pro.
Choetech 100W GaN Dual USB-C Charger is one of the latest products from Choetech. It retails for US$59.99 (S$86) with free shipping to Singapore.
This dual USB-C charger is powered by GaN, which stands for Gallium nitride. The technology allows the charger to have a smaller footprint by providing higher efficiency in charging. You can read more about GaN in The Verge’s Gallium nitride is the silicon of the future.
HyperJuice 100W GaN USB-C Charger is a 4-port charger that is started from Kickstarter.
The project was successfully funded on 10th December 2019 after raising a total of US$2,200,642 out of their initial goal of US$100,000 from 27,942 backers.
Bought the Telesin 3-Channel Charger Charging Box with Three Batteries for my GoPro Hero 7 Black from Lazada.
The usual retail price is S$52.90, but during 11/11, the price went down to S$48.90, and on top of that, I have an S$5 Lazada voucher.