According to The Sunday Times, The Duke of York has reportedly been replaced by Roland Walker, Afghanistan war veteran, at Trooping the Colour. Last year, Roland Walker has received Distinguished Service Order honour from the Queen at Buckingham Palace.
Andrew the pariah prince is pushed aside from Queen’s birthday parade
Disgraced Duke of York will be replaced at Trooping the Colour by a decorated Afghanistan war veteran
https://www.thetimes.co.uk/article/...d-aside-from-queens-birthday-parade-gghdgbgc3
Roya Nikkhah has also tweeted out the article asking the question of why The Duke of York has still held on to his Colonel of the Regiment at Grenadier Guard. Since the article is behind the paywall, I'm not quite sure if this question/point is ever mentioned.
Roya Nikkhah @RoyaNikkhah
EXCLUSIVE The Duke of York will be replaced at Trooping the Colour by war hero Major General Roland Walker. Questions now raised about why Prince Andrew still holds his @GrenadierGds role when Prince Harry lost his @RoyalMarines title?
@thesundaytimes
7:16 PM · Feb 28, 2021·Twitter for iPhone
Without comparing this situation with Harry, I think the Colonel of the Regiment of Grenadier Guard could go to The Duke of Cambridge, The Princess Royal or even The Earl of Wessex. This honorary military title was handed from The Duke of Edinburgh to The Duke of York. Judging by a list on Wikipedia (Fraser, David (1998) [1978]. The Grenadier Guards. Men-at-Arms Series # 73. London: Osprey Publishing. ISBN 0-85045-284-8.) at one point, it was held by then Princess Elizabeth. The Regiment Colonel is not limited to the direct line of succession or even in the Royal Family. Some members of the Nobility held this role.
https://en.wikipedia.org/wiki/Grenadier_Guards#Regimental_Colonels