So This Opfanpage.com has made a post this week that New Vivre Card(leaked Vol2 chapter 2) confirms that Sanji has future sight ! and since then I see posts on Instagram,reddit from Sanji Fans that he has it despite No solid Proof.After searching forum I found out it is an image from 2019 Vivre card where Oda used images of Sanji,Zoro,Luffy to explain Observation,armament and Conquerer haki and last line of observation explanation was some people can see future with hard training.It didn't specifically say that Sanji can do it so I wanted to clear things up.
1-That Vivre card is from 2019 when Oden story was going on in manga so there's no way Sanji already had it (if he is ever gonna get it).At that Point of time Luffy and Zoro hadn't mastered Internal destruction and Emission of haki respectively.
2-Luffy had to fight a top commander with Future sight to understand it in the first place so how can Sanji have without doing any work !
3- There is a persistent headcanon in community that Sanji has better observation and Zoro has better armament,,It stems from Old SBS just after timeskip where Oda was asked which haki type Monster trio is proficient in ! and He answered Sanji- observation,zoro-armament,Luffy- conquerer and the point was They have better command over that haki than other two types of haki, He never compared Luffy,Zoro and Sanji's haki to each other.That is why when Sanji was in kamabakka he refined his observation in order to keep running from 99 Okama and his Armament was not decent after time skip but in wano he seems to have improved it.
4- Sanji never countered Katakuri's Future sight, Katakuri saw that sanji will dodge the priest so he shot himself and Sanji dodged it using base observation. If Katakuri was using future sight he would have seen the future again to see where he would land after dodging and would have shot another bean like he was predicting Luffy's movements in future and throwing another attack beforehand but he never did that.he probably didn't consider that Sanji has decent base observation haki too.