Sorry, but what are you talking about? You said you don't know Lazarus but you say you want a Delphi like Lazarus, you decline a series of features without knowing them or having tried them.
Try using Lazarus with your project, install Lazarus on Linux and work from there and then try to "distribute" your work to other Linux PCs: X11 and Wayland, Linux 4.xx, Linux 5.xx, Linux 6.xx , GTK2, GTK3, GTK3.2 GTK+, GTK4, QT5, QT5Moded, QT6, etc .... I won't continue to mention all the libraries otherwise .... Let's not talk about the distros (Debian, Fedora, Ubuntu just to name a few some common).
Are you sure you want a Delphi like this?
Fmx runs in a few OS (Linux, Mac, Android and IOS, as well as Windows) but at least the environment is unique.
Use third-party libraries and see if they also run in all operating systems supported by Lazarus.
FastReport for example on Lazarus only runs on Windows and Linux.
Lazarus really doesn't have "skins". And, just to be clear, "skins" also exist in FMX, not just in VCLs.
Etc...
As others have said, it is better to have the IDE that is there now and most of the engineering resources dedicated to this IDE rather than splitting efforts and finding ourselves with new IDEs with new problems and the old one with old unsolved problems.
The time will also come for a Delphi on "Mars", but only when the time is ripe.
Bye