they all made ijtihaad, the sahaba differed with each other alot, we are not comanded to follow all there ijtihaad, the command is when they are leaders, because you must obey your leaders especially the rightly guided ones, and their judgement is closest to the truthHow can you say that when the prophet ﷺ ordered us to imitate the Sheykhayn Abu Bakar and Umar radiyalahu anhumaa.
قال رسول الله صلى الله عليه وسلم: اقتدوا باللذين من بعدي : أبي بكر وعمر
Ibn Hazm explaining this hadith said: the prophet ordered us to imitate and follow the example of the Sheykhayn because he was sure they will never diverge from his Sunnah.
The Ijtihad of Umar and Abubakar is Deen.
but their ijtihaad is not always correct, there were many sahaba who had ikhtilaaf with Umar RA,
plus Umar RA used his hikma to alleviate hudood punishments and change some
an example, if I told people cutting peoples hands off may not be applicable, they would say im liberal, but Umar RA alleviated the hudood punishment when his people were in poverty because stealing was done due to neccesity
now, here we see, the crime is the exact same, but we see that the reason for the punishment of the crime is not here, so the hudood is alleviated. point being the sharia applies to certain situations and times, the way our countries are now is not the same as in the past, many rulings have changed, so it is up to the scholars in our day and age to see what is suitable
All I am saying is we live in completely different times, so to understand if it applies in our time now requires scholars to decide, not a blanket statement that every single country should implement this right now which is a Muslim country