From NHS Scotland:

Between April and June 2020, 95.3% of the 7,195 people who started their first drug or alcohol treatment waited 3 weeks or less, an increase from the same quarter in the previous year (93.4%), which may be in part attributable to a fall in the number of completed waits during the quarter (10,560 in April to June 2019).

https://beta.isdscotland.org/find-publications-and-data/lifestyle-and-behaviours/substance-use/national-drug-and-alcohol-treatment-waiting-times/

The target is 90% and NHS Scotland has been beating it for years, to widespread media inattention.