When my husband did accounts as an MS/and elder, he was told to be sure to ready all the acknowledgement letters from the WTS on the platform, usually the part "accounts report" regarding the donations sent in. He was told it would be indirect way to remind the "brothers and sisters" to donate. I don't know if that do that any more or even give a monthly account of the donations that month and the expenses, and whether they were in the black or in the red.
If that wasn't dunning every month, and every letter.
Edit 1 here is a quote from the 2016 God's Kingdom Rule publication:
https://wol.jw.org/en/wol/d/r1/lp-e/1102014257?q=accounts+report&p=sen
Each month, the brother who cares for the congregation’s accounts prepares a financial report, which is read to the congregation.
Edit 2 (2008)
https://wol.jw.org/en/wol/d/r1/lp-e/202008322?q=accounts+report+letter&p=par
10 min: Local announcements. Read accounts report and donation acknowledgments. Discuss the branch letter, which appears on page 1.