The circular letter from immigration only refers to "Proof of ownership of property in Indonesia with luxury category". So I thought maybe (luxury) property valued 2M (Milyar) or more could be accepted.
I spotted one agent referring to "A luxury property is mostly referring to large villas, condominiums, and townhouses (at least 300 m2) that cost at least 6x more than the “regular” housing in the area." [From Regulation of the Minister of Public Housing of the Republic of Indonesia No. 7 of 2013]. Here is no mention of property value. The agent is Emerhub.
So in summary it is not required locking up 2M funds in Indonesia as the alternative is to use a guarantor (agent) a few weeks for the 2M funds required for VISA while ITAS can be obtained as owner of a "luxury property".
In any case best to await the detailed regulation.
CIRCULAR LETTER NUMBER IMI-0740.GR.01.01 YEAR 2022
SECOND HOME VISA
1.b. Proof of Fund in the form of an account owned by a foreigner or guarantor with a value of at least Rp.2,000,000,000.00 (two billion rupiah) or equivalent;
SECOND HOME ITAS
4 b) A statement of commitment stating that the foreigner applying for a Second Home ITAS for 5 (five) years has Proof of Funds in the form of:
i) Account belonging to the foreigner concerned at a State-Owned Bank with a value of at least Rp. 2,000,000,000.00 (two billion rupiah), or
ii) Proof of ownership of property in Indonesia with luxury category in the name of a foreigner in accordance with the legislation in the land/agrarian sector,