This is the 2nd or third time you had complained about this. You can check this out yourself. Go to settings > software update > last update > what's new, use the drop down menu on the left (same line as what's new), check Learn more, there will be a link SPECIFICALLY for your device and whoever your carrier is. Check the build number, if it matches with yours for the latest, then its good. Usually the website gives 3 different build numbers but one of them should match with your phone. Also, this option may not be available if the update that was done is a huge software upgrade, e.g. Pie to Android 11. Edit: 3 build numbers on website, match the one for your phone, not 3 builds on phone, match one said in the link, my bad.
Or check the latest security patch month and match it to the same month once you clicked on the link. Normally even if the newest security patches have been globally released by Samsung themselves, focken Canadian carriers take their sweet-**bleep** time to 'test' it for their network, hence why your security patch month is at least a month late from what the actual month is.
Native QR scanner support was added with the One UI update this year, if I was not mistaken. However, considering that its an A-series device and not the flagship S-series, then it might have been pushed back update after update.
I would like to know if the patch is displayed in setting -》about phone-》software information or does it just show as security patch August 1 2019? The date of when it becomes available is not as important if you I can identify the patch.
And yes, it should be displayed in that part of the setting. Look at Baseband Version. That is basically the firmware your phone is running on. Try to match it on the latest two patches your device had.(Along with your security patch. - normally a month behind what the current month is.)