X86 partition problem

I'm using OpenWrt 23.05.5 x86 with a 256GB SSD

When expanding the ext4 /dev/sda2 partition, root is mounted read only after reboot.

I've tried both EFI and non-EFI firmware. Any ideas? Cheers

Expanding how ?

https://openwrt.org/docs/guide-user/installation/openwrt_x86

Post the whole sequence of you doing it ...

I just used gparted from a live ISO to expand the partition

Try following this process

then why did you post a link to a howto you didn't follow ?

I did follow it, then I tried gparted

The word "just" can have two meanings here, which one is it ?

"just" as in "recently"