Country comparisons can provide important insights into how a country develops in comparison to other countries. In a country comparison, it is easy to see how a country performs in an international comparison.
With the help of a country comparison, you can place a subject in an overall context.
In order for a country comparison to make sense, there are a number of things to consider. For example, it does not help to examine the absolute GDP between Germany and Luxembourg. Germany will always be ahead, as it has considerably more inhabitants. Instead, you have to look for metrics that are more comparable. In this case, GDP per capita is a good choice.
AllThatStats was specifically designed to make a country comparison. Let's stick to the GDP/head example.
If some data is missing for the time you are looking for, then the functions "interpolate missing values" or "forecast time series" can be helpful. For example, if the Luxembourg data is missing for the current period, it may be sufficient to replace it with the penultimate period. forecast -> Constant -> latest periodicity