The problem is, you use Linux Lite, which is based on Ubuntu LTS, which is based on Debian, which is designed to ship outdated software.
On Windows it's quite common to have packaged installers, so if you download Lazarus installer for Windows it will install Lazarus together with FPC. This is Windows philosophy and the Lazarus team follows that. BUT this has it's drawbacks. If you install multiple Lazarus versions like 2.2.6, 3.0, 3.2, 3.4 and 3.6, they all been released with the same FPC version due to the long release cycle, so besides your 5 Lazarus installations, you will have the exact same FPC version installed 5 times as well (with FPC being like 500mb in size, thats like 2GBs of wasted space).
Linux on the other hand goes the route of globally installing dependencies. So you install FPC and Lazarus seperately, and can do so through different means. E.g. through the deb/rpm packages, you can install from source, through your system package manager, manually download the binaries, etc.
The most straight forward way to install software on Linux, and also what is usually recommended, is through the systems package manager. Which works great, but has a big drawback. Many distros are based on Debian, which by design is outdated (they call it "stable"), meaning you will only get new Versions of software when you update your OS, so if you are using LTS systems like Ubuntu, it means you only get updates once every 2 years.
While you can manually install newer Versions of the Software, it requires knowledge about your distro.
So my general recommendation to this problem is: If you need up to date software don't use a Linux that is purposefully designed to not do that (Debian, Ubuntu, Mint, etc.), but instead use a Distro that provides up to date software (Fedora, OpenSuse, Manjaro, etc.).
Sadly for some reason it has become the norm to recommend new Linux users these "stable" distros, which then in turn get's them to inevitibly run into the problem with outdated software, just to have them get mad at the software, instead of questioning if they actually chose the distro to their needs, rather than trying to make a distro fit their requirements which never was intended to do so.