The phrase "although not highly" is correct and usable in written English.
It can be used to introduce a contrast or qualification regarding a particular subject or situation, often indicating that something is not at a high level or degree.
Example: "The project was successful, although not highly praised by critics."
Alternatives: "even if not greatly" or "despite not being highly".
Although not highly original, the music is skillfully written and personal.
This leaf shedding might be problematic, too, as their foliage (although not highly toxic as is often claimed) does contain chemical irritants.
Her parents, although not highly educated, have an ardent commitment to their children's education.
Despite this, significant (although not highly so) differences were observed between the seedlots examined in this study for all the growth and wood quality traits that were assessed.
Although not highly significant statistically, the estimates clearly show that the "losers'" absolute beauty, not their standing in a ranking of beauty, determines how the "winner" of a round in this game treats them.
Yunnan Province is located in the heavily minority area of southwest China and has both a minority university (Yunnan Minzu University, formerly Yunnan University for Nationalities) and a conventional although not highly ranked regional institution, Yunnan University.
Exhaustion of appellate remedies within the System would have afforded that agency full opportunity to apply its expertise to these and other questions, thereby facilitating the disclosure of factors which, although germane, are not highly visible to tribunals less familiar with the regulatory scheme.
A G concept is influential in the network because, although it is not highly connected, it acts as a bridge in the network, linking different themes or topics.
Nitrate is the final compound in the nitrification process, although it is not highly toxic for shrimp, it is recommended to be kept lower than 100 mg L−1 in culture water.
Although PviWRKY173 was not highly expressed at this time point, PviWRKY114 was.
The number of farms for bullfighting cattle appeared to improve to final model, although it was not highly significant.
