Pixel 5 and Pixel 4a 5G dual SIM support has been improved in March update
Google Pixel 4a 5G and Pixel 5 are Not Dual-SIM Smartphones
Pixel 4a/Pixel 6a: How to Activate eSIM and use Dual SIM | Jio, Airtel, VI - YouTube
Set up eSIM on Pixel - Guidebooks with Google
Multi-Carriers eSIM for Google Pixel 4a | Available in 220 Countries | Pay as you Go Mobile Data Internet Services for Google Pixel 4a
Google Pixel 4a 5G 128 GB - Black - Unlocked | Back Market
International eSIM for Google Pixel 4a 5G | Available in 220 Countries | Pay as you Go Mobile Data for Google Pixel 4a 5G in Panama Voice and Text Services.
Google Pixel 4a 5G 128GB (Unlocked) Single eSIM 6.2in 12.2MP 6GB RAM Just Black | eBay
Download an eSIM to the device using a QR code | eSIM | Pixel 4a 5G | T-Mobile Support