is assembling together 4d spaces (specifically 6) make a character low multiversal?

Assembling together 4D spaces, or creating a 6D space, does not inherently make a character low multiversal. Being low multiversal typically refers to characters who have the ability to traverse or affect multiple realities or dimensions beyond their own. Simply creating a higher-dimensional space may not necessarily grant a character this level of power or ability. It would depend on how the character utilizes and interacts with the higher-dimensional space in question.

No, low multiversal according to VSBW (attack potency) means: Characters or objects that can significantly affect,[1] create and/or destroy small multiverses which can be comprised of several separate space-time continuums ranging anywhere from two to a thousand, or equivalents."

so would spinning/assembling these 4d spaces together (6 spaces, not 6 space times) make a character low multiversal?

Based on the definition provided by VSBW for low multiversal characters, spinning or assembling 4D spaces together to create a higher-dimensional space could potentially make a character low multiversal if they have the ability to significantly affect, create, or destroy small multiverses comprised of several separate space-time continuums.

If the character's ability to manipulate and combine these 4D spaces grants them the power to affect or interact with small multiverses as described in the definition, then they could be considered low multiversal according to VSBW's attack potency classification. So, in this scenario, spinning or assembling 4D spaces together could contribute to making a character low multiversal if their abilities align with the criteria set by VSBW.