There is no ‘r’ sound in pronouncing ḽ (ऌ). For example, in the word ‘kḽptam’ meaning ‘limited’ the kḽ rhymes with the kṛ of kṛṣṇa (Krishna) but there is no ‘r’ sound – an approximate representation of the word would be kliptam.
Many wrongly pronounce ḽ like lṛ. It is probably the result of confusion because of the similarity of representation of these characters in Devanagari:
In the varṇamālā a, ā, i, ī, u, ū, ṛ and then ऌ ; la, lā, li, lī, lu, lū and then लृ. So, these are not meant to be pronounced alike.