OTG was not as big as Solo but with the chart reform it entered, it did extremely well. It was the biggest solo from a idol soloist in the chart. Internationally, it was bigger though.
Lisa will surely do extremely well internationally as she is the most famous in BP. But SK is still questionable since she is not as famous as Rosé is in SK. And even though BR ranking is not to be used as a measure for an idol's popularity in SK, it can still give you the idea of how idols are known in SK. With the latest BR ranking, Lisa got a low rank despite the news of her solo.
So whether it might be a good song or not, Lisa's SK charting will not be assuring for now. It might chart around Top 20-25 since the chart right now is easier to penetrate compared to 24hits. I just hope it won't be in English so that it will gain more support from the gp.