Which computers use FIT files natively?

Apologies I cannot find this online, which bike computers produce FIT files from rides natively (rather than GPX and TCX). I have aftermarket analysis software that only works with FIT. Usually my preferred computers are low cost with GPS, like the Garmin 25, Sigma Pure GPS but am struggling to find this info. I thought about export from strava but its doesnt do FIT. thanks for any help.
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this site seems to be able to create a FIT file from gpx
https://www.gpsies.com/convert.do?language=en
also see
https://ridewithgps.com/help/export-file-formats
I've a feeling you can download old fit files from Garmin connect too or convert and download other options.
I back up my rides on my 520 (and previously my 500) by logging into the device as a USB drive and downloading the .fit files. I dont think it is possible to convert another type of file into a .fit.
you could use golden cheetah instead, it will import a wide range of file types
https://www.goldencheetah.org/