Supporting data for peer-reviewed publication entitled: 'Photometric detection of internal gravity waves in upper main-sequence stars. IV. Comparable stochastic low-frequency variability in SMC, LMC, and Galactic massive stars', published in A&A. For the purpose of open access, the authors have applied a CC BY licence to the author accepted manuscript version and made it publicly available: https://arxiv.org/abs/2410.12726 Evolutionary models and stability window calculations courtesy of Jermyn et al. 2022 (DOI: 10.3847/1538-4357/ac4e89) are publicly available via: https://github.com/adamjermyn/conv_trends TESS full-frame image data are publicly available from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute (STScI): https://archive.stsci.edu/missions-and-data/tess TESS light curves (provided in this repository) were extracted using the publicly available tglc (Han & Brandt 2023; DOI: 10.3847/1538-3881/acaaa7) software package: https://github.com/TeHanHunter/TESS_Gaia_Light_Curve SLF variability parameters (provided in this repository; cf. Tables 1 and 2 of the paper) were obtained using GP regression with the publicly available celerite2 (Foreman-Mackey et al. 2017; DOI: 10.3847/1538-3881/aa9332) software package: https://celerite2.readthedocs.io/en/latest/ and confidence intervals were obtained using the publicly available pymc3 (Salvatier et al. 2016; https://doi.org/10.7717/peerj-cs.55) software package: https://github.com/pymc-devs/pymc This research was supported in part by the National Science Foundation (NSF) under Grant Number NSF PHY-1748958; the Research Foundation Flanders (FWO) with grant agreement numbers 1286521N, 11F7120N, and V411621N; UK Research and Innovation (UKRI) in the form of a Frontier Research grant under the UK government's ERC Horizon Europe funding guarantee (SYMPHONY; grant number: EP/Y031059/1); a Royal Society University Research Fellowship (URF; grant number: URF\R1\231631); and the KU Leuven Research Council (grant number C16/18/005: PARADISE).