Need help with live system expansion (zfs+geli)

I am writing to you from a live system (zfs+geli) that I am in the middle
of resizing to fit the entire disk.

Background : The freebsd os (geli encryption) was installed using 290G only
on a 500G SSD. The disk was almost getting full - hence the need for more
space - can't use backup, hence on a live system.

This is the disk :
-------------------------------------------------------------
gpart show
=>       40  976773088  ada0  GPT  (466G)
         40       1024     1  freebsd-boot  (512K)
       1064        984        - free -  (492K)
       2048   16777216     2  freebsd-swap  (8.0G)
   16779264  608362496     3  freebsd-zfs  (290G)
  625141760  351631368        - free -  (168G)
-----------------------------------------------------------------
this is the output after resizing :
---------------------------------------------------------------
sudo gpart resize -i 3 ada0
Password:
ada0p3 resized
terminal$ gpart show
=>       40  976773088  ada0  GPT  (466G)
         40       1024     1  freebsd-boot  (512K)
       1064        984        - free -  (492K)
       2048   16777216     2  freebsd-swap  (8.0G)
   16779264  959993864     3  freebsd-zfs  (458G)
-------------------------------------------------------------------
I went ahead and did
------------------------------------------------
zpool online -e zroot /dev/ada0p3.eli
--------------------------------------------------
However it didn't produce any output, strangely and the output of zpool
list also doesn't seem to show that the disk is fully occupied 458G vs 290G
- it's the same output as before:
-------------------------------------------------------------------------
zpool list
NAME    SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP
 HEALTH  ALTROOT
zroot   290G   270G  19.9G        -         -    69%    93%  1.00x
 ONLINE  -
-----------------------------------------------------------------------------

What do I do next? I'm really stressed and hoping this live system doesn't
fail.
I did try the freebsd forums and was suggested to ask here.

Note 1 : As the handbook suggested for a live system - I have set
------ sysctl kern.geom.debugflags=16 ----------
source : https://docs.freebsd.org/en/books/handbook/disks/

Sorry for bothering you - but really could use some help.