Coevett, the last competition of Kimutai and Kisorio were in 2019. After that time, because of COVID, they didn't have any more contract with any management, and for that reason they quitted running.
Justus Kipkosgei Kimutai : last race in Taiyuan on 8 Sep 2019 (marathon in 2:09:46)
Mathew Kisorio : last race in Beijing on 3 Nov 2019 (marathon in 2:07:06).
Without any opportunity to compete (the only markes for those athletes was China, but in the last two years 95% of marathons were cancelled in the Country), they went back to their main activity : to be FARMERS, and a farmer doesn't have any clue about whereabouts as athlete, when is no longer an athlete.
Different is the case of Morris Munene Gachaga, still in full activity and in younger age.
Anyway, what you continue not to understand is that the different basic situation in Kenya, compared with western Countries, is connected with a totaly different mentality. If you are a Kenyan running 2:07, you are not a Professional Athlete, you are a Farmer.
These are the times of Kenyan athletes for the Kenyan lists in the last 4 years, in position 30 and 50 :
2018 : 2:07:28 (30) - 2:08:43 (50)
2019 : 2:06:59 (30) - 2:08:22 (50)
2020 : 2:10:23 (30) - 2:13:16 (50)
2021 : 2:06:56 (30) - 2:08:25 (50)
In 2020 there were very little opportunities to compete because of the cancellation of the most part of Marathons in the world, and many athletes of medium-high level decided to quit training because no chances of competing (Kisorio and Kimutai among them).
Athletes in top 30 in Kenya are not in any official international whereabouts (WADA and AIU). They are in the National Whereabouts, and with not systemic training (such as happened during the COVID period) don't have the mentality to be "prisoners" of a daily window obliging them to be at home, every day, at the same time. The normal life for a normal person in Kenya doesn't work in that way.
To put these cases at the same level of the case of missed tests of Coleman, sprinters earning millions dollars per year, and leaving in US, is an insult to a normal intellingence of every person, and, because you are not stupid, I kindly invite you to be more flexible, considering which is the real life for those athletes in Kenya, comparing with the life, and the MUSTS, of some European or American athletes able to run their same times, in continents where you are in top 5 with with that level of perfrmances.