Recent Neural Topic Models for 20Newsgroup Corpus:
ETM: Embedded Topic models (2019) https://doi.org/10.1162/tacl_a_00325
ATM: Adversarial-neural Topic Model (2019): https://doi.org/10.1016/j.ipm.2019.102098
Top2Vec (2020): https://doi.org/10.48550/arXiv.2008.09470
CTM: Contextualized Topic Models (2021): https://aclanthology.org/2021.acl-short.96
BERTopic (2022): https://doi.org/10.48550/arXiv.2203.05794