A great feature called Background Error Check is going to be released in October 2020 with Wave 2 release for Business Central.
Currently, it is available as Public Preview.
On the General Journal Batch page, you can choose Background Error Check to have Business Central validate financial journals, such as general or payment journals, while you're working on them. When the validation is enabled, the Journal Check FactBox displays next to the journal lines and will show issues in the current line and the whole batch.
Validation happens when you load a financial journal batch, and when you choose another journal line. The Issues total tile in the FactBox shows the total number of issues that Business Central found, and choosing it will open an overview of the issues.
You can use the Show Lines with Issues and Show All Lines actions to toggle between journal lines that have or don't have issues.
The new Journal Line Details FactBox provides a quick overview and access to data from journal lines, such as the G/L account, customer, or vendor, as well as to the posting setup for specific accounts.
View the below video for a complete demonstration of the feature.
Hope it helps! Cheers!