Heightening Dispel Magic

[Baelor the Bard]

Hello,
I'm sure this has been asked already, but I can't find an answer. Is Dispel Magic a heightenable spell? As I understand the counteract check rules you roll a spell roll using your spellcasting modifier and proficiency modifier against a DC determined by the level of what you are trying to dispel. If the level is higher than the third level dispel magic spell, your check takes a -5 for each level by which the effect's level exceeds 3. As far as I can tell, Dispel Magic is not marked as heightenable, so even a 20th level caster with a Potent magic item buffing their casting score is going to find dispelling even sixth and seventh level spells extremely difficult. Is it possible to cast dispel at higher levels to increase its level, even though it doesn't have any specific heightenable effect?

[Fuzzy-Wuzzy]

Every spell is heightenable, whether or not it has a Heightened entry in its description.

page 192, Heightened Prepared Spells wrote:

You can prepare a spell in a higher-level slot than its normal spell level. This is called heightening your spell. If you do this, the spell’s level increases to match the higher level of the new spell slot. This can be useful because some effects, such as dispelling, depend on the spell’s level.

[Baelor the Bard]

Thanks. For some reason I thought that that only applied to spells that have heightened effects but that's written pretty clearly.