Talk:concerned

Postpositive
The Cambridge Grammar of the English Language reads

Postpositive present (or absent) denotes a temporary state of affairs: compare the present government. The same applies to involved and concerned, though here the attributive sense differs more (cf. deeply involved activists, concerned parents).

However, oxfordlearnersdictionaries.com does not seem to include the second meaning as an adjective [often passive] concern somebody/something to affect somebody/something; to involve somebody/something ''Don't interfere in what doesn't concern you. The loss was a tragedy for all concerned (= all those affected by it)''.

And yet still Merriam Webster’s Advanced Learner’s English Dictionary :

CONCERNED 2a. having an interest or involvement in something: a discussion that will be of interest to everyone concerned; The lawyers called a meeting of all the concerned parties --Backinstadiums (talk) 00:44, 20 January 2020 (UTC)
 * III. Passive, to be concerned. This occurs in some senses which are non-existent or obsolete in the active; in other senses it is much more used than the active. https://www.oed.com/oed2/00046215 --Backinstadiums (talk) 17:35, 21 August 2021 (UTC)

concerned with
If a book, speech, or piece of information is concerned with a subject, it deals with it: This chapter is concerned with recent changes. https://www.wordreference.com/EnglishUsage/concerned#1 --Backinstadiums (talk) 17:40, 19 January 2020 (UTC)
 * concern something (also be concerned with something) to be about something, The book is primarily concerned with Soviet-American relations during the Cold War. --Backinstadiums (talk) 17:19, 21 August 2021 (UTC)

Socially ‘aware’; actively involved in social or moral issues. Cf. caring
[https://oed.com/oed2/00046220 Socially ‘aware’; actively involved in social or moral issues. Cf. caring The people concerned are caring, concerned and aware]--Backinstadiums (talk) 17:26, 21 August 2021 (UTC)