You should be able to run your imperative Apex call from a getRecord adapter:

import { LightningElement, api, wire } from 'lwc';
import { getRecord } from 'lightning/uiRecordApi';
import myMethod from '@salesforce/apex/MyClass.myMethod';

export default class MyLWC extends LightningElement {
    @api recordId;
    
    @wire(getRecord, { recordId: '$recordId', fields: ['Account.Id'] })
    getRecordData({ error, data }) {
        if (this.recordId) {
            this.imperativeApexFunction();
        }
    }
}

imperativeApexFunction() {
    myMethod({ recordId: this.recordId })
        .then( result => {
            console.log(result);
            // Handle result
        })
        .catch( error => {
            console.log(error);
            // Handle error
        })
}

The @wire getRecord adapter is intrinsically connected to the LDS, and will automatically run when a change is saved to the parent record, or a related child record, causing your Apex method to rerun as well

The recordId is not always set by default on page load, and it is helpful to include a check to see if there is a recordId before running your Apex method to prevent null errors

You should be able to run your imperative Apex call from a getRecord adapter:

import { LightningElement, api, wire } from 'lwc';
import { getRecord } from 'lightning/uiRecordApi';
import { refreshApex } from '@salesforce/apex';
import myMethod from '@salesforce/apex/MyClass.myMethod';

export default class MyLWC extends LightningElement {
    @api recordId;
    result;
    
    @wire(getRecord, { recordId: '$recordId', fields: ['Account.Id'] })
    getRecordData({ error, data }) {
        if (this.recordId) {
            refreshApex(this.result);
            this.imperativeApexFunction();
        }
    }
}

imperativeApexFunction() {
    myMethod({ recordId: this.recordId })
        .then( result => {
            console.log(result);
            this.result = result;
            // Handle result
        })
        .catch( error => {
            console.log(error);
            // Handle error
        })
}

The @wire getRecord adapter is intrinsically connected to the LDS, and will automatically run when a change is saved to the parent record, or a related child record, causing your Apex method to rerun as well

The recordId is not always set by default on page load, and it is helpful to include a check to see if there is a recordId before running your Apex method to prevent null errors