no notification for available software updates

[corrado venturini]

in 'Software & Updates' 'Updates' '...check for updates' I have 'Daily' and for '...other updates' I have 'Display immediately'
now from 'sudo apt update' I see a lot of updates available
BUT I don't see notification about

corrado@corrado-n7-noble:~$ sudo apt install unattended-upgrades
[sudo] password for corrado:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
unattended-upgrades is already the newest version (2.9.1+nmu4ubuntu1).
unattended-upgrades set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 108 not upgraded.
corrado@corrado-n7-noble:~$

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: software-properties-gtk 0.99.48
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
Uname: Linux 6.8.0-31-generic x86_64
ApportVersion: 2.28.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu May 30 15:58:00 2024
InstallationDate: Installed on 2024-04-26 (34 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)