TWRP for new 2020 Samsung device I wanted to buy a new phone, but one that I could install TWRP on. I searched and found that the Galaxy A01 CORE is cheap and good and I almost bought it.  I tried to search for TWRP for the device unsuccessfully.
I have not found any guide or website that explains how to install TWRP on this device. Is it because it's new and only came out on 6/8/20?
The question is basically about new phones and TWRP, since the phone came out it has been about 4 months, how long does it take until a version of TWRP is released that is suitable for the phone? If I want a phone with TWRP I will always have to buy an old one? Because new phones are always released every year, and the problem is that stores are no longer selling phones from 2019, so what can be done?
Is there some way to install TWRP on Galaxy A01 Core?
TWRP is not released by OEMs. It is developed independently by volunteers after the device is marketed and it's kernel and ROM sources are released  (they are legally obliged under GPLv2.0) .

Not all devices have TWRP because they are not suitable for development for technical reasons like bootloader can't be unlocked, SoC not suitable, OEM releasing source late etc. Also, developers make TWRP for devices that are popular and suitable for development. OEMs at times give out free devices to developers to make their devices popular.

If you are keen on buying a device that has TWRP support, keep a tab on the device forums on XDA
and based on the TWRP /kernel /ROM support from developer community, take a decision to buy or not.

This site doesn't give buying recommendations. If you can't find the device in stores, look for alternatives like on line sites etc. Google is your friend.

Or else, learn how to develop (this site doesn't support questions on that) and make your own TWRP. Note that TWRP is specific to the device &amp; device variant (Samsung makes several variants for the same model) and you can't use TWRP meant for some other device, irrespective of similarities in devices.