Hi. The house numbers here are already mapped from 1 to 43 with an interpolation line, which will automatically determine the mid addresses. Further details about the addresses should be added primarily to the end nodes.
See https://wiki.openstreetmap.org/wiki/Key:addr:*#Tags_for_interpolation_ways
Number 45 is mapped already as a separate building.

The building is mapped as a single terrace (https://wiki.openstreetmap.org/wiki/Tag:building%3Dterrace), with addresses as separate nodes. No address on the terrace is needed.

If you wanted to replace the terrace with a more detailed number of individual terraced houses, they will need to be drawn individually, with an address on each one of them. (The programme JOSM has some automated plugins for that, if you want to look into it). It would be more detailed, but it doesn't necessarily add much more information, unless the house are of significantly different sizes or shapes.