I have found John Owen's comments on this passage to be helpful, and I'll add them here in case they may be of interest:
"1. The thing spoken of, “the assembling of ourselves together;” for it is not the church-state absolutely, but the actual assemblies of believers, walking together in that state, which the apostle intends. ... These assemblies were of two sorts:
(1.) Stated, on the Lord’s day, or first day of the week, 1 Corinthians 16:2; Acts 20:7.
(2.) Occasional, as the duties or occasions of the church did require, 1 Corinthians 5:4.
The due performance of all solemn stated, orderly, evangelical worship: in prayer, preaching of the word, singing of psalms, and the administration of the sacraments.
. . .
There is a twofold forsaking of these assemblies:
(1.) That which is total, . . . and
(2.) That which is partially only, in lack of diligence and conscientious care in a constant attendance unto them . . . "
Source:
https://www.studylight.org/commentary/hebrews/10-25.html#joc
