right now OG are out cos they don't have enough dpc points to reach the top 12 dpc ranking, but, as @batang_bitcoin said above, they'll participate in the TI western EU qualifiers. They need to win that to qualify automatically to TI
I don't think that they need the DPC points to qualify for The International since they are already the champion of the previous TI so they are automatically qualified, if they weren't qualified, they would have taken the DPC season seriously.
They do, there's a reset during the pandemic and that's why there were majors and minors that were the tournaments needed to gain DPC points.
The rules have changed and they're not automatically qualified, check this link for which teams have already qualified the points of other teams needed to at least get a secured slot in this upcoming TI.
Qualified:
https://liquipedia.net/dota2/The_International/2021DPC points:
https://liquipedia.net/dota2/Dota_Pro_Circuit/2021/RankingsOn the DPC points list, OG is #34 which is far from the qualifying DPC points needed for a secured slot.