Help: lag even near router

So i bought the app from playstore. my device is redmi pad 2 9.7"

* 9,7 inch 2K (2048 x 1280 piksel), rasio 16:10, dan *refresh rate* 120 Hz. * Snapdragon 6s 4G Gen 2. * RAM 4 GB

setup with local network. the ps5 connect lan, the tab connect wifi. 5ghz, huawei be3.

when i use the pxplay, with 1080p 60fps and hevc, it jitter. not so much, but sometimes jitter.

my question: 1. is it the network (i', sure its not because i play just about 1 meter from router on the same room)?

2. or the device is weak? slow procie and low ram?

is there any setting on pxplay i should try?

never try on another device thou