Been shopping in shopee and lazada in the philippines. The difference is that lazada is doing a much better job. I can both go to lazada store in philippines or singapore in the same phone app. For shopee they try to make it impossible for you because they country restrict their apps. So you cannot download their shopee ph app if your country is like say singapore. Secondly they use phone verification to confirm your order and server error occurs when you type in a singapore number.
Lazada you don’t really have such a problem.