If you have an SSD the installer should have configured fstrim.timer to trigger the fstrim.service every week or so.
As an example, this is what I see for the last few days:
localhost:~ # journalctl |grep fstrim
<snip>
May 29 15:03:38 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
May 29 20:06:42 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
May 30 15:56:56 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
May 30 16:43:17 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
May 30 19:44:54 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
May 30 22:11:45 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
May 31 11:04:28 localhost.localdomain fstrim[4352]: /boot/efi: 169.5 MiB (177774592 bytes) trimmed on /dev/sda1
May 31 11:04:28 localhost.localdomain fstrim[4352]: /home: 7.2 GiB (7679602688 bytes) trimmed on /dev/sda2
May 31 11:04:28 localhost.localdomain fstrim[4352]: /: 16.9 GiB (18136068096 bytes) trimmed on /dev/sda3
May 31 11:04:28 localhost.localdomain systemd[1]: fstrim.service: Succeeded.
May 31 11:44:57 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
May 31 19:02:51 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
Jun 01 12:26:05 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
Jun 01 20:25:54 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
Jun 01 20:49:02 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
Jun 01 23:17:50 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
Jun 02 14:20:27 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
Jun 02 15:09:41 localhost.localdomain systemd[1]: fstrim.timer: Succeeded.
localhost:~ #
If you look at the systemd status of the Timer service, you’ll see the Timer’s next expiry time – the point in time when the fstrim service will be triggered to execute …