PCB design Review of Portable power supply unit

[Sagar]

I have designed this power supply unit to get 3.3, 5, 8 and 12V. So that it acts like a secondry supply to test and power small projects and mircocontroller.
1) I used TP5100 as charging in 2S mode
2) 5v boost up mt3608 charging to charge the battery direclty from usb_5v
3) Then some linear regulators for 3.3 and 5v
4) And again a mt3608 booster for 12V out
I may utilize same booster circuit for charging the battery and 12V but then I have to change the jumpers and all, which I don't want. I have posted the schematics in a another post similar to this one.

[Doctorandus_P]

PCB layout is quite bad.
First rule in any dual layer PCB these days is to have a proper GND plane.

You do not have a GND plane at all. There is a lot of copper, but it is cut willy nilly into little chunks.

I also see something resembling an inductor footprint.
Looking at your other thread:
https://www.eevblog.com/forum/eda/schematic-review-portable-power-supply/

I see there are one or two SMPS circuits on this PCB.
SMPS circuits need a lot of special attention to PCB layout. A PCB also can not be properly reviewed without the schematic.