The Ukrainian arms manufacture is gradually gaining fresh production capacity of various types of ammunition including this artillery [in the russian calibre](article:1016124), as well as NATO-wst. This allows for increased autonomy and independence, which translates into speeding up supplies of equipment needed for units on the front. In the case of kal combat agents. 155 mm of them [production was to start in the second half of last year](article:1041337), as mentioned by Alexander Kamyszyn (former Minister of strategical Industries). It's most likely what's seen in the pictures below.