Consider seeing if the particular pieces of software you use have their own donation system, then donate there. A donation to a smaller project could have a very large impact on its future.
The Linux Foundation is carried by billion-dollar companies and that's also the interests it serves, from what Icm hearing. I wouldn't worry about its survival.
The right name for "linux" is GNU/Linux. Initially Linux was just a kernel, with lots of free software from FSF. You can donate to FSF at https://www.fsf.org/about/ways-to-donate/
the linux foundation is not a 501(c)(3), it's a 501(c)(6). contributions to it are not deductible, so probably not eligible for your employer's matching program.
If you're looking for more suggestions I'd say look into donating to your distribution of choice whether it be Debian, Ubuntu, Fedora, etc.
https://supporters.eff.org/donate